21576131365272 has 64 divisors (see below), whose sum is σ = 58845032064000. Its totient is φ = 6538106355840.

The previous prime is 21576131365249. The next prime is 21576131365277. The reversal of 21576131365272 is 27256313167512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21576131365277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14924473 + ... + 16306199.

It is an arithmetic number, because the mean of its divisors is an integer number (919453626000).

Almost surely, 2^{21576131365272} is an apocalyptic number.

21576131365272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21576131365272 is an abundant number, since it is smaller than the sum of its proper divisors (37268900698728).

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

21576131365272 is a wasteful number, since it uses less digits than its factorization.

21576131365272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440896 (or 1440892 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 51.

The spelling of 21576131365272 in words is "twenty-one trillion, five hundred seventy-six billion, one hundred thirty-one million, three hundred sixty-five thousand, two hundred seventy-two".