72222407 has 6 divisors (see below), whose sum is σ = 73259064. Its totient is φ = 71200220.

The previous prime is 72222391. The next prime is 72222421. The reversal of 72222407 is 70422227.

It is a happy number.

It is not a de Polignac number, because 72222407 - 2⁴ = 72222391 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 (72222457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2123 + ... + 12204.

It is an arithmetic number, because the mean of its divisors is an integer number (12209844).

Almost surely, 2^72222407 is an apocalyptic number.

72222407 is a deficient number, since it is larger than the sum of its proper divisors (1036657).

72222407 is an equidigital number, since it uses as much as digits as its factorization.

72222407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14469 (or 14398 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 72222407 is about 8498.3767273521. The cubic root of 72222407 is about 416.4446809724. Note that the first 3 decimals are identical.

The spelling of 72222407 in words is "seventy-two million, two hundred twenty-two thousand, four hundred seven".