21251526232 has 16 divisors (see below), whose sum is σ = 39848158800. Its totient is φ = 10625350560.

The previous prime is 21251526217. The next prime is 21251526281. The reversal of 21251526232 is 23262515212.

It is a junction number, because it is equal to n+sod(n) for n = 21251526194 and 21251526203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371994 + ... + 425302.

It is an arithmetic number, because the mean of its divisors is an integer number (2490509925).

Almost surely, 2^21251526232 is an apocalyptic number.

It is an amenable number.

21251526232 is a deficient number, since it is larger than the sum of its proper divisors (18596632568).

21251526232 is a wasteful number, since it uses less digits than its factorization.

21251526232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103146 (or 103142 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The spelling of 21251526232 in words is "twenty-one billion, two hundred fifty-one million, five hundred twenty-six thousand, two hundred thirty-two".