72158047 has 16 divisors (see below), whose sum is σ = 83341440. Its totient is φ = 61880832.

The previous prime is 72158041. The next prime is 72158057. The reversal of 72158047 is 74085127.

It is a happy number.

It is not a de Polignac number, because 72158047 - 2²³ = 63769439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72158041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15393 + ... + 19525.

It is an arithmetic number, because the mean of its divisors is an integer number (5208840).

Almost surely, 2^72158047 is an apocalyptic number.

72158047 is a deficient number, since it is larger than the sum of its proper divisors (11183393).

72158047 is a wasteful number, since it uses less digits than its factorization.

72158047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 72158047 is about 8494.5892778874. The cubic root of 72158047 is about 416.3209412345.

The spelling of 72158047 in words is "seventy-two million, one hundred fifty-eight thousand, forty-seven".