213131131022320 has 80 divisors (see below), whose sum is σ = 568523442045888. Its totient is φ = 72789197783040.

The previous prime is 213131131022309. The next prime is 213131131022339. The reversal of 213131131022320 is 23220131131312.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 740306091 + ... + 740593930.

Almost surely, 2^{213131131022320} is an apocalyptic number.

213131131022320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213131131022320 is an abundant number, since it is smaller than the sum of its proper divisors (355392311023568).

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

213131131022320 is a wasteful number, since it uses less digits than its factorization.

213131131022320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480900298 (or 1480900292 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 213131131022320 its reverse (23220131131312), we get a palindrome (236351262153632).

The spelling of 213131131022320 in words is "two hundred thirteen trillion, one hundred thirty-one billion, one hundred thirty-one million, twenty-two thousand, three hundred twenty".