521122368 has 112 divisors (see below), whose sum is σ = 1492154496. Its totient is φ = 159559680.

The previous prime is 521122363. The next prime is 521122379. The reversal of 521122368 is 863221125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521122363) 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, 701005 + ... + 701747.

It is an arithmetic number, because the mean of its divisors is an integer number (13322808).

Almost surely, 2^521122368 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 521122368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746077248).

521122368 is an abundant number, since it is smaller than the sum of its proper divisors (971032128).

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

521122368 is a wasteful number, since it uses less digits than its factorization.

521122368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052 (or 1042 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 521122368 is about 22828.1047833586. The cubic root of 521122368 is about 804.7232915966.

The spelling of 521122368 in words is "five hundred twenty-one million, one hundred twenty-two thousand, three hundred sixty-eight".