325501561 has 12 divisors (see below), whose sum is σ = 413067600. Its totient is φ = 253637160.

The previous prime is 325501549. The next prime is 325501573. The reversal of 325501561 is 165105523.

It is an interprime number because it is at equal distance from previous prime (325501549) and next prime (325501573).

It is not a de Polignac number, because 325501561 - 2¹³ = 325493369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (325501511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301411 + ... + 302488.

It is an arithmetic number, because the mean of its divisors is an integer number (34422300).

Almost surely, 2^325501561 is an apocalyptic number.

It is an amenable number.

325501561 is a deficient number, since it is larger than the sum of its proper divisors (87566039).

325501561 is a wasteful number, since it uses less digits than its factorization.

325501561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603924 (or 603917 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 325501561 is about 18041.6618137022. The cubic root of 325501561 is about 687.8879342720.

It can be divided in two parts, 3255015 and 61, that added together give a triangular number (3255076 = T₂₅₅₁).

The spelling of 325501561 in words is "three hundred twenty-five million, five hundred one thousand, five hundred sixty-one".