72412213 has 4 divisors (see below), whose sum is σ = 72429868. Its totient is φ = 72394560.

The previous prime is 72412199. The next prime is 72412229. The reversal of 72412213 is 31221427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31221427 = 19 ⋅1643233.

It can be written as a sum of positive squares in 2 ways, for example, as 54493924 + 17918289 = 7382^2 + 4233^2 .

It is a cyclic number.

It is not a de Polignac number, because 72412213 - 2¹³ = 72404021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72412243) 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, 895 + ... + 12067.

It is an arithmetic number, because the mean of its divisors is an integer number (18107467).

Almost surely, 2^72412213 is an apocalyptic number.

It is an amenable number.

72412213 is a deficient number, since it is larger than the sum of its proper divisors (17655).

72412213 is a wasteful number, since it uses less digits than its factorization.

72412213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17654.

The product of its digits is 672, while the sum is 22.

The square root of 72412213 is about 8509.5365913779. The cubic root of 72412213 is about 416.8091779895.

The spelling of 72412213 in words is "seventy-two million, four hundred twelve thousand, two hundred thirteen".