325687531 has 16 divisors (see below), whose sum is σ = 372618400. Its totient is φ = 282175488.

The previous prime is 325687517. The next prime is 325687541. The reversal of 325687531 is 135786523.

It is a 11-Lehmer number, since φ(325687531) divides (325687531-1)¹¹.

It is a cyclic number.

It is not a de Polignac number, because 325687531 - 2¹⁷ = 325556459 is a prime.

It is a super-2 number, since 2×325687531² = 212144735697751922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (325687501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20875 + ... + 32971.

It is an arithmetic number, because the mean of its divisors is an integer number (23288650).

Almost surely, 2^325687531 is an apocalyptic number.

325687531 is a deficient number, since it is larger than the sum of its proper divisors (46930869).

325687531 is a wasteful number, since it uses less digits than its factorization.

325687531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12238.

The product of its digits is 151200, while the sum is 40.

The square root of 325687531 is about 18046.8149821513. The cubic root of 325687531 is about 688.0189138425.

The spelling of 325687531 in words is "three hundred twenty-five million, six hundred eighty-seven thousand, five hundred thirty-one".