72325522 has 4 divisors (see below), whose sum is σ = 108488286. Its totient is φ = 36162760.

The previous prime is 72325489. The next prime is 72325541. The reversal of 72325522 is 22552327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22552327 = 7 ⋅3221761.

It can be written as a sum of positive squares in only one way, i.e., 71927361 + 398161 = 8481^2 + 631^2 .

It is a super-2 number, since 2×72325522² = 10461962265144968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18081379 + ... + 18081382.

Almost surely, 2^72325522 is an apocalyptic number.

72325522 is a deficient number, since it is larger than the sum of its proper divisors (36162764).

72325522 is a wasteful number, since it uses less digits than its factorization.

72325522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36162763.

The product of its digits is 8400, while the sum is 28.

The square root of 72325522 is about 8504.4413102802. The cubic root of 72325522 is about 416.6427786483.

Adding to 72325522 its reverse (22552327), we get a palindrome (94877849).

The spelling of 72325522 in words is "seventy-two million, three hundred twenty-five thousand, five hundred twenty-two".