72165532 has 6 divisors (see below), whose sum is σ = 126289688. Its totient is φ = 36082764.

The previous prime is 72165523. The next prime is 72165547. The reversal of 72165532 is 23556127.

It is a junction number, because it is equal to n+sod(n) for n = 72165494 and 72165503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9020688 + ... + 9020695.

Almost surely, 2^72165532 is an apocalyptic number.

It is an amenable number.

72165532 is a deficient number, since it is larger than the sum of its proper divisors (54124156).

72165532 is a wasteful number, since it uses less digits than its factorization.

72165532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18041387 (or 18041385 counting only the distinct ones).

The product of its digits is 12600, while the sum is 31.

The square root of 72165532 is about 8495.0298410306. The cubic root of 72165532 is about 416.3353358153.

The spelling of 72165532 in words is "seventy-two million, one hundred sixty-five thousand, five hundred thirty-two".