21514515400545 has 32 divisors (see below), whose sum is σ = 34455676216320. Its totient is φ = 11463592197120.

The previous prime is 21514515400537. The next prime is 21514515400597. The reversal of 21514515400545 is 54500451541512.

It is not a de Polignac number, because 21514515400545 - 2³ = 21514515400537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21514515400497 and 21514515400506.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 508824805 + ... + 508867085.

It is an arithmetic number, because the mean of its divisors is an integer number (1076739881760).

Almost surely, 2^{21514515400545} is an apocalyptic number.

It is an amenable number.

21514515400545 is a deficient number, since it is larger than the sum of its proper divisors (12941160815775).

21514515400545 is a wasteful number, since it uses less digits than its factorization.

21514515400545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73465.

The product of its (nonzero) digits is 400000, while the sum is 42.

The spelling of 21514515400545 in words is "twenty-one trillion, five hundred fourteen billion, five hundred fifteen million, four hundred thousand, five hundred forty-five".