72292522 has 4 divisors (see below), whose sum is σ = 108438786. Its totient is φ = 36146260.

The previous prime is 72292513. The next prime is 72292537. The reversal of 72292522 is 22529227.

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

It can be written as a sum of positive squares in only one way, i.e., 63536841 + 8755681 = 7971^2 + 2959^2 .

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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18073129 + ... + 18073132.

Almost surely, 2^72292522 is an apocalyptic number.

72292522 is a deficient number, since it is larger than the sum of its proper divisors (36146264).

72292522 is a wasteful number, since it uses less digits than its factorization.

72292522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36146263.

The product of its digits is 10080, while the sum is 31.

The square root of 72292522 is about 8502.5009261981. The cubic root of 72292522 is about 416.5794017427.

The spelling of 72292522 in words is "seventy-two million, two hundred ninety-two thousand, five hundred twenty-two".