21612514565043 has 32 divisors (see below), whose sum is σ = 33971030795520. Its totient is φ = 13533174587520.

The previous prime is 21612514565029. The next prime is 21612514565051. The reversal of 21612514565043 is 34056541521612.

21612514565043 is a `hidden beast` number, since 2 + 1 + 6 + 125 + 14 + 5 + 6 + 504 + 3 = 666.

It is not a de Polignac number, because 21612514565043 - 2¹³ = 21612514556851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21612514565043.

It is not an unprimeable number, because it can be changed into a prime (21612514565003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47723805 + ... + 48174542.

It is an arithmetic number, because the mean of its divisors is an integer number (1061594712360).

Almost surely, 2^{21612514565043} is an apocalyptic number.

21612514565043 is a deficient number, since it is larger than the sum of its proper divisors (12358516230477).

21612514565043 is a wasteful number, since it uses less digits than its factorization.

21612514565043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95898864 (or 95898858 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 21612514565043 in words is "twenty-one trillion, six hundred twelve billion, five hundred fourteen million, five hundred sixty-five thousand, forty-three".