521959944 has 64 divisors (see below), whose sum is σ = 1498464000. Its totient is φ = 149843520.

The previous prime is 521959943. The next prime is 521960069. The reversal of 521959944 is 449959125.

It is a junction number, because it is equal to n+sod(n) for n = 521959893 and 521959902.

It is not an unprimeable number, because it can be changed into a prime (521959943) 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, 47014 + ... + 57045.

It is an arithmetic number, because the mean of its divisors is an integer number (23413500).

Almost surely, 2^521959944 is an apocalyptic number.

It is an amenable number.

521959944 is an abundant number, since it is smaller than the sum of its proper divisors (976504056).

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

521959944 is a wasteful number, since it uses less digits than its factorization.

521959944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104098 (or 104094 counting only the distinct ones).

The product of its digits is 583200, while the sum is 48.

The square root of 521959944 is about 22846.4426990287. The cubic root of 521959944 is about 805.1541923943.

The spelling of 521959944 in words is "five hundred twenty-one million, nine hundred fifty-nine thousand, nine hundred forty-four".