72221037 has 16 divisors (see below), whose sum is σ = 112611840. Its totient is φ = 40308912.

The previous prime is 72221029. The next prime is 72221047. The reversal of 72221037 is 73012227.

It is not a de Polignac number, because 72221037 - 2³ = 72221029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72220998 and 72221016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72221027) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 39087 + ... + 40892.

It is an arithmetic number, because the mean of its divisors is an integer number (7038240).

Almost surely, 2^72221037 is an apocalyptic number.

It is an amenable number.

72221037 is a deficient number, since it is larger than the sum of its proper divisors (40390803).

72221037 is a wasteful number, since it uses less digits than its factorization.

72221037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80032.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 72221037 is about 8498.2961233414. The cubic root of 72221037 is about 416.4420477508.

The spelling of 72221037 in words is "seventy-two million, two hundred twenty-one thousand, thirty-seven".