521972358 has 32 divisors (see below), whose sum is σ = 1080760320. Its totient is φ = 167887680.

The previous prime is 521972323. The next prime is 521972359. The reversal of 521972358 is 853279125.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521972359) 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, 62866 + ... + 70682.

It is an arithmetic number, because the mean of its divisors is an integer number (33773760).

Almost surely, 2^521972358 is an apocalyptic number.

521972358 is an abundant number, since it is smaller than the sum of its proper divisors (558787962).

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

521972358 is a wasteful number, since it uses less digits than its factorization.

521972358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8212.

The product of its digits is 151200, while the sum is 42.

The square root of 521972358 is about 22846.7143808470. The cubic root of 521972358 is about 805.1605754543.

It can be divided in two parts, 5219 and 72358, that added together give a palindrome (77577).

The spelling of 521972358 in words is "five hundred twenty-one million, nine hundred seventy-two thousand, three hundred fifty-eight".