21532531112 has 16 divisors (see below), whose sum is σ = 40382743860. Its totient is φ = 10763799424.

The previous prime is 21532531057. The next prime is 21532531121. The reversal of 21532531112 is 21113523512.

It can be written as a sum of positive squares in 2 ways, for example, as 18981675076 + 2550856036 = 137774^2 + 50506^2 .

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, 270893 + ... + 341244.

Almost surely, 2^21532531112 is an apocalyptic number.

It is an amenable number.

21532531112 is a deficient number, since it is larger than the sum of its proper divisors (18850212748).

21532531112 is a wasteful number, since it uses less digits than its factorization.

21532531112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616540 (or 616536 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The spelling of 21532531112 in words is "twenty-one billion, five hundred thirty-two million, five hundred thirty-one thousand, one hundred twelve".