21532542125 has 64 divisors (see below), whose sum is σ = 28870732800. Its totient is φ = 15977088000.

The previous prime is 21532542041. The next prime is 21532542131. The reversal of 21532542125 is 52124523512.

It is not a de Polignac number, because 21532542125 - 2¹⁰ = 21532541101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21532542091 and 21532542100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79455740 + ... + 79456010.

It is an arithmetic number, because the mean of its divisors is an integer number (451105200).

Almost surely, 2^21532542125 is an apocalyptic number.

21532542125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21532542125 is a deficient number, since it is larger than the sum of its proper divisors (7338190675).

21532542125 is a wasteful number, since it uses less digits than its factorization.

21532542125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711 (or 701 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

The spelling of 21532542125 in words is "twenty-one billion, five hundred thirty-two million, five hundred forty-two thousand, one hundred twenty-five".