521201431332 has 60 divisors (see below), whose sum is σ = 1391513397120. Its totient is φ = 170037341424.

The previous prime is 521201431297. The next prime is 521201431337. The reversal of 521201431332 is 233134102125.

521201431332 is a `hidden beast` number, since 5 + 21 + 201 + 431 + 3 + 3 + 2 = 666.

It is a super-2 number, since 2×521201431332² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 521201431296 and 521201431305.

It is not an unprimeable number, because it can be changed into a prime (521201431337) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17098032 + ... + 17128487.

It is an arithmetic number, because the mean of its divisors is an integer number (23191889952).

Almost surely, 2^521201431332 is an apocalyptic number.

It is an amenable number.

521201431332 is an abundant number, since it is smaller than the sum of its proper divisors (870311965788).

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

521201431332 is a wasteful number, since it uses less digits than its factorization.

521201431332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34226582 (or 34226571 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 521201431332 its reverse (233134102125), we get a palindrome (754335533457).

The spelling of 521201431332 in words is "five hundred twenty-one billion, two hundred one million, four hundred thirty-one thousand, three hundred thirty-two".