72031226 has 4 divisors (see below), whose sum is σ = 108046842. Its totient is φ = 36015612.

The previous prime is 72031207. The next prime is 72031237. The reversal of 72031226 is 62213027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62213027 = 1523 ⋅40849.

It can be written as a sum of positive squares in only one way, i.e., 66504025 + 5527201 = 8155^2 + 2351^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18007805 + ... + 18007808.

Almost surely, 2^72031226 is an apocalyptic number.

72031226 is a deficient number, since it is larger than the sum of its proper divisors (36015616).

72031226 is a wasteful number, since it uses less digits than its factorization.

72031226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36015615.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 72031226 is about 8487.1211844771. The cubic root of 72031226 is about 416.0768973047.

The spelling of 72031226 in words is "seventy-two million, thirty-one thousand, two hundred twenty-six".