201252531 has 4 divisors (see below), whose sum is σ = 268336712. Its totient is φ = 134168352.

The previous prime is 201252529. The next prime is 201252563. The reversal of 201252531 is 135252102.

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

It is not a de Polignac number, because 201252531 - 2¹ = 201252529 is a prime.

It is a super-2 number, since 2×201252531² = 81005162467811922, 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 = 201252498 and 201252507.

It is not an unprimeable number, because it can be changed into a prime (201252631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33542086 + ... + 33542091.

It is an arithmetic number, because the mean of its divisors is an integer number (67084178).

Almost surely, 2^201252531 is an apocalyptic number.

201252531 is a deficient number, since it is larger than the sum of its proper divisors (67084181).

201252531 is an equidigital number, since it uses as much as digits as its factorization.

201252531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67084180.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 201252531 is about 14186.3501648592. The cubic root of 201252531 is about 586.0218155942.

The spelling of 201252531 in words is "two hundred one million, two hundred fifty-two thousand, five hundred thirty-one".