213177970944 has 81 divisors (see below), whose sum is σ = 614708550183. Its totient is φ = 71051936256.

The previous prime is 213177970939. The next prime is 213177970961. The reversal of 213177970944 is 449079771312.

It is a happy number.

The square root of 213177970944 is 461712.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×213177970944² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22157367 + ... + 22166985.

Almost surely, 2^213177970944 is an apocalyptic number.

213177970944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

213177970944 is the 461712-nd square number.

It is an amenable number.

213177970944 is an abundant number, since it is smaller than the sum of its proper divisors (401530579239).

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

213177970944 is an frugal number, since it uses more digits than its factorization.

213177970944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19260 (or 9624 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 54.

The spelling of 213177970944 in words is "two hundred thirteen billion, one hundred seventy-seven million, nine hundred seventy thousand, nine hundred forty-four".