21616232600531 has 2 divisors, whose sum is σ = 21616232600532. Its totient is φ = 21616232600530.

The previous prime is 21616232600497. The next prime is 21616232600591. The reversal of 21616232600531 is 13500623261612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21616232600531 - 2¹⁴ = 21616232584147 is a prime.

It is a super-2 number, since 2×21616232600531² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21616232600591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10808116300265 + 10808116300266.

It is an arithmetic number, because the mean of its divisors is an integer number (10808116300266).

Almost surely, 2^{21616232600531} is an apocalyptic number.

21616232600531 is a deficient number, since it is larger than the sum of its proper divisors (1).

21616232600531 is an equidigital number, since it uses as much as digits as its factorization.

21616232600531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 21616232600531 in words is "twenty-one trillion, six hundred sixteen billion, two hundred thirty-two million, six hundred thousand, five hundred thirty-one".