521211116 has 48 divisors (see below), whose sum is σ = 990662400. Its totient is φ = 239159232.

The previous prime is 521211107. The next prime is 521211137. The reversal of 521211116 is 611112125.

It is a super-2 number, since 2×521211116² = 543322054883930912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333545 + ... + 335103.

It is an arithmetic number, because the mean of its divisors is an integer number (20638800).

Almost surely, 2^521211116 is an apocalyptic number.

It is an amenable number.

521211116 is a deficient number, since it is larger than the sum of its proper divisors (469451284).

521211116 is a wasteful number, since it uses less digits than its factorization.

521211116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718 (or 1716 counting only the distinct ones).

The product of its digits is 120, while the sum is 20.

The square root of 521211116 is about 22830.0485325809. The cubic root of 521211116 is about 804.7689709055.

The spelling of 521211116 in words is "five hundred twenty-one million, two hundred eleven thousand, one hundred sixteen".