521162064 has 120 divisors (see below), whose sum is σ = 1580559552. Its totient is φ = 159667200.

The previous prime is 521162053. The next prime is 521162069. The reversal of 521162064 is 460261125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521162069) 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, 102789 + ... + 107739.

Almost surely, 2^521162064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521162064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (790279776).

521162064 is an abundant number, since it is smaller than the sum of its proper divisors (1059397488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521162064 is a wasteful number, since it uses less digits than its factorization.

521162064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025 (or 5016 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 521162064 is about 22828.9742213705. The cubic root of 521162064 is about 804.7437240878.

The spelling of 521162064 in words is "five hundred twenty-one million, one hundred sixty-two thousand, sixty-four".