72158855 has 8 divisors (see below), whose sum is σ = 89384064. Its totient is φ = 55864800.

The previous prime is 72158839. The next prime is 72158881. The reversal of 72158855 is 55885127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72158855 - 2⁴ = 72158839 is a prime.

It is a super-2 number, since 2×72158855² = 10413800709822050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232616 + ... + 232925.

It is an arithmetic number, because the mean of its divisors is an integer number (11173008).

Almost surely, 2^72158855 is an apocalyptic number.

72158855 is a deficient number, since it is larger than the sum of its proper divisors (17225209).

72158855 is a wasteful number, since it uses less digits than its factorization.

72158855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465577.

The product of its digits is 112000, while the sum is 41.

The square root of 72158855 is about 8494.6368374404. The cubic root of 72158855 is about 416.3224951664.

The spelling of 72158855 in words is "seventy-two million, one hundred fifty-eight thousand, eight hundred fifty-five".