21272480515 has 32 divisors (see below), whose sum is σ = 30326788800. Its totient is φ = 14120325120.

The previous prime is 21272480501. The next prime is 21272480533. The reversal of 21272480515 is 51508427212.

It is a happy number.

It is not a de Polignac number, because 21272480515 - 2⁵ = 21272480483 is a prime.

It is a super-2 number, since 2×21272480515² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103510 + ... + 230779.

It is an arithmetic number, because the mean of its divisors is an integer number (947712150).

Almost surely, 2^21272480515 is an apocalyptic number.

21272480515 is a deficient number, since it is larger than the sum of its proper divisors (9054308285).

21272480515 is a wasteful number, since it uses less digits than its factorization.

21272480515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334407.

The product of its (nonzero) digits is 44800, while the sum is 37.

The spelling of 21272480515 in words is "twenty-one billion, two hundred seventy-two million, four hundred eighty thousand, five hundred fifteen".