972213312500 has 42 divisors (see below), whose sum is σ = 2126689535838. Its totient is φ = 388885300000.

The previous prime is 972213312493. The next prime is 972213312523. The reversal of 972213312500 is 5213312279.

It can be written as a sum of positive squares in 7 ways, for example, as 960627373456 + 11585939044 = 980116^2 + 107638^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 7715207 + ... + 7840206.

It is an arithmetic number, because the mean of its divisors is an integer number (50635465139).

Almost surely, 2^972213312500 is an apocalyptic number.

It is an amenable number.

972213312500 is an abundant number, since it is smaller than the sum of its proper divisors (1154476223338).

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

972213312500 is an equidigital number, since it uses as much as digits as its factorization.

972213312500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15555447 (or 15555420 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

Adding to 972213312500 its reverse (5213312279), we get a palindrome (977426624779).

The spelling of 972213312500 in words is "nine hundred seventy-two billion, two hundred thirteen million, three hundred twelve thousand, five hundred".