325731631 has 4 divisors (see below), whose sum is σ = 328218264. Its totient is φ = 323245000.

The previous prime is 325731569. The next prime is 325731641. The reversal of 325731631 is 136137523.

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 325731631 - 2¹³ = 325723439 is a prime.

It is a super-2 number, since 2×325731631² = 212202190867840322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 325731593 and 325731602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325731641) 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, 1243120 + ... + 1243381.

It is an arithmetic number, because the mean of its divisors is an integer number (82054566).

Almost surely, 2^325731631 is an apocalyptic number.

325731631 is a deficient number, since it is larger than the sum of its proper divisors (2486633).

325731631 is a wasteful number, since it uses less digits than its factorization.

325731631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486632.

The product of its digits is 11340, while the sum is 31.

The square root of 325731631 is about 18048.0367630388. The cubic root of 325731631 is about 688.0499663718.

The spelling of 325731631 in words is "three hundred twenty-five million, seven hundred thirty-one thousand, six hundred thirty-one".