72022931 has 4 divisors (see below), whose sum is σ = 76259592. Its totient is φ = 67786272.

The previous prime is 72022879. The next prime is 72022933. The reversal of 72022931 is 13922027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72022931 - 2¹⁴ = 72006547 is a prime.

It is a super-2 number, since 2×72022931² = 10374605179661522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72022931.

It is not an unprimeable number, because it can be changed into a prime (72022933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2118305 + ... + 2118338.

It is an arithmetic number, because the mean of its divisors is an integer number (19064898).

Almost surely, 2^72022931 is an apocalyptic number.

72022931 is a deficient number, since it is larger than the sum of its proper divisors (4236661).

72022931 is a wasteful number, since it uses less digits than its factorization.

72022931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236660.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 72022931 is about 8486.6324888026. The cubic root of 72022931 is about 416.0609251097.

Adding to 72022931 its reverse (13922027), we get a palindrome (85944958).

The spelling of 72022931 in words is "seventy-two million, twenty-two thousand, nine hundred thirty-one".