521161051 has 16 divisors (see below), whose sum is σ = 562383360. Its totient is φ = 481399200.

The previous prime is 521161019. The next prime is 521161073. The reversal of 521161051 is 150161125.

It is a happy number.

It is not a de Polignac number, because 521161051 - 2⁵ = 521161019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521161651) 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, 273201 + ... + 275101.

It is an arithmetic number, because the mean of its divisors is an integer number (35148960).

Almost surely, 2^521161051 is an apocalyptic number.

521161051 is a deficient number, since it is larger than the sum of its proper divisors (41222309).

521161051 is a wasteful number, since it uses less digits than its factorization.

521161051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274.

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 521161051 is about 22828.9520346423. The cubic root of 521161051 is about 804.7432026851.

The spelling of 521161051 in words is "five hundred twenty-one million, one hundred sixty-one thousand, fifty-one".