72255905 has 16 divisors (see below), whose sum is σ = 88128000. Its totient is φ = 56865600.

The previous prime is 72255889. The next prime is 72255959. The reversal of 72255905 is 50955227.

It is not a de Polignac number, because 72255905 - 2⁴ = 72255889 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100136 + ... + 100854.

It is an arithmetic number, because the mean of its divisors is an integer number (5508000).

Almost surely, 2^72255905 is an apocalyptic number.

It is an amenable number.

72255905 is a deficient number, since it is larger than the sum of its proper divisors (15872095).

72255905 is a wasteful number, since it uses less digits than its factorization.

72255905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 72255905 is about 8500.3473458442. The cubic root of 72255905 is about 416.5090557664.

The spelling of 72255905 in words is "seventy-two million, two hundred fifty-five thousand, nine hundred five".