3251521161 has 24 divisors (see below), whose sum is σ = 5395713024. Its totient is φ = 1848277440.

The previous prime is 3251521139. The next prime is 3251521181. The reversal of 3251521161 is 1611251523.

3251521161 is a `hidden beast` number, since 32 + 51 + 521 + 1 + 61 = 666.

It is not a de Polignac number, because 3251521161 - 2¹¹ = 3251519113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3251521111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123076 + ... + 147141.

It is an arithmetic number, because the mean of its divisors is an integer number (224821376).

Almost surely, 2^3251521161 is an apocalyptic number.

It is an amenable number.

3251521161 is a deficient number, since it is larger than the sum of its proper divisors (2144191863).

3251521161 is a wasteful number, since it uses less digits than its factorization.

3251521161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270421 (or 270418 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 3251521161 is about 57022.1111587426. Note that the first 4 decimals coincide. The cubic root of 3251521161 is about 1481.4790973107.

Adding to 3251521161 its reverse (1611251523), we get a palindrome (4862772684).

The spelling of 3251521161 in words is "three billion, two hundred fifty-one million, five hundred twenty-one thousand, one hundred sixty-one".