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31232100401 = 487162139563
BaseRepresentation
bin11101000101100101…
…000000100000110001
32222121121201002101022
4131011211000200301
51002430404203101
622203044145225
72153650321205
oct350545004061
988547632338
1031232100401
1112277785327
126077698215
132c397185a8
141723d32b05
15c2bda5a1b
hex745940831

31232100401 has 8 divisors (see below), whose sum is σ = 31316330304. Its totient is φ = 31147953840.

The previous prime is 31232100353. The next prime is 31232100433. The reversal of 31232100401 is 10400123213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31232100401 - 218 = 31231838257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31232100401.

It is not an unprimeable number, because it can be changed into a prime (31232100481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769646 + ... + 809208.

It is an arithmetic number, because the mean of its divisors is an integer number (3914541288).

Almost surely, 231232100401 is an apocalyptic number.

It is an amenable number.

31232100401 is a deficient number, since it is larger than the sum of its proper divisors (84229903).

31232100401 is a wasteful number, since it uses less digits than its factorization.

31232100401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41671.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31232100401 its reverse (10400123213), we get a palindrome (41632223614).

The spelling of 31232100401 in words is "thirty-one billion, two hundred thirty-two million, one hundred thousand, four hundred one".

Divisors: 1 487 1621 39563 789427 19267181 64131623 31232100401