21530511514325 has 48 divisors (see below), whose sum is σ = 30393466157952. Its totient is φ = 14976635520000.

The previous prime is 21530511514249. The next prime is 21530511514367. The reversal of 21530511514325 is 52341511503512.

It is not a de Polignac number, because 21530511514325 - 2²⁴ = 21530494737109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90208145 + ... + 90446505.

It is an arithmetic number, because the mean of its divisors is an integer number (633197211624).

Almost surely, 2^{21530511514325} is an apocalyptic number.

21530511514325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21530511514325 is a deficient number, since it is larger than the sum of its proper divisors (8862954643627).

21530511514325 is a wasteful number, since it uses less digits than its factorization.

21530511514325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252686 (or 252681 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 21530511514325 in words is "twenty-one trillion, five hundred thirty billion, five hundred eleven million, five hundred fourteen thousand, three hundred twenty-five".