72522427 has 4 divisors (see below), whose sum is σ = 75675600. Its totient is φ = 69369256.

The previous prime is 72522419. The next prime is 72522433. The reversal of 72522427 is 72422527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72422527 = 3251 ⋅22277.

It is a cyclic number.

It is not a de Polignac number, because 72522427 - 2³ = 72522419 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72522407) 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, 1576552 + ... + 1576597.

It is an arithmetic number, because the mean of its divisors is an integer number (18918900).

Almost surely, 2^72522427 is an apocalyptic number.

72522427 is a deficient number, since it is larger than the sum of its proper divisors (3153173).

72522427 is a wasteful number, since it uses less digits than its factorization.

72522427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153172.

The product of its digits is 15680, while the sum is 31.

The square root of 72522427 is about 8516.0100399189. The cubic root of 72522427 is about 417.0205369946.

It can be divided in two parts, 7252242 and 7, that added together give a square (7252249 = 2693²).

The spelling of 72522427 in words is "seventy-two million, five hundred twenty-two thousand, four hundred twenty-seven".