72220532 has 12 divisors (see below), whose sum is σ = 126483840. Its totient is φ = 36082296.

The previous prime is 72220531. The next prime is 72220537. The reversal of 72220532 is 23502227.

It is a junction number, because it is equal to n+sod(n) for n = 72220498 and 72220507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72220531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518 + ... + 12029.

It is an arithmetic number, because the mean of its divisors is an integer number (10540320).

Almost surely, 2^72220532 is an apocalyptic number.

It is an amenable number.

72220532 is a deficient number, since it is larger than the sum of its proper divisors (54263308).

72220532 is a wasteful number, since it uses less digits than its factorization.

72220532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13990 (or 13988 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 72220532 is about 8498.2664114512. The cubic root of 72220532 is about 416.4410771023.

Adding to 72220532 its reverse (23502227), we get a palindrome (95722759).

The spelling of 72220532 in words is "seventy-two million, two hundred twenty thousand, five hundred thirty-two".