72221571532 has 36 divisors (see below), whose sum is σ = 140680654240. Its totient is φ = 32412425760.

The previous prime is 72221571523. The next prime is 72221571553. The reversal of 72221571532 is 23517512227.

It is a junction number, because it is equal to n+sod(n) for n = 72221571491 and 72221571500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 906183 + ... + 982654.

Almost surely, 2^72221571532 is an apocalyptic number.

It is an amenable number.

72221571532 is a deficient number, since it is larger than the sum of its proper divisors (68459082708).

72221571532 is a wasteful number, since it uses less digits than its factorization.

72221571532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888942 (or 1888929 counting only the distinct ones).

The product of its digits is 58800, while the sum is 37.

The spelling of 72221571532 in words is "seventy-two billion, two hundred twenty-one million, five hundred seventy-one thousand, five hundred thirty-two".