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201332431 = 867723203
BaseRepresentation
bin11000000000000…
…01011011001111
3112000211202011201
430000001123033
5403020114211
631551130331
74663204006
oct1400013317
9460752151
10201332431
11a3713043
12575139a7
1332932921
141ca4bc3d
1512a1e0c1
hexc0016cf

201332431 has 4 divisors (see below), whose sum is σ = 201364312. Its totient is φ = 201300552.

The previous prime is 201332423. The next prime is 201332437. The reversal of 201332431 is 134233102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201332431 - 23 = 201332423 is a prime.

It is a super-2 number, since 2×2013324312 = 81069495544739522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201332399 and 201332408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201332437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2925 + ... + 20278.

It is an arithmetic number, because the mean of its divisors is an integer number (50341078).

Almost surely, 2201332431 is an apocalyptic number.

201332431 is a deficient number, since it is larger than the sum of its proper divisors (31881).

201332431 is an equidigital number, since it uses as much as digits as its factorization.

201332431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31880.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 201332431 is about 14189.1659726708. The cubic root of 201332431 is about 586.0993582181.

Adding to 201332431 its reverse (134233102), we get a palindrome (335565533).

The spelling of 201332431 in words is "two hundred one million, three hundred thirty-two thousand, four hundred thirty-one".

Divisors: 1 8677 23203 201332431