72154115 has 24 divisors (see below), whose sum is σ = 100196880. Its totient is φ = 49705920.

The previous prime is 72154091. The next prime is 72154157. The reversal of 72154115 is 51145127.

It is not a de Polignac number, because 72154115 - 2⁶ = 72154051 is a prime.

It is a super-2 number, since 2×72154115² = 10412432622866450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8357 + ... + 14633.

It is an arithmetic number, because the mean of its divisors is an integer number (4174870).

Almost surely, 2^72154115 is an apocalyptic number.

72154115 is a deficient number, since it is larger than the sum of its proper divisors (28042765).

72154115 is a wasteful number, since it uses less digits than its factorization.

72154115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6323 (or 6312 counting only the distinct ones).

The product of its digits is 1400, while the sum is 26.

The square root of 72154115 is about 8494.3578332915. The cubic root of 72154115 is about 416.3133791134.

The spelling of 72154115 in words is "seventy-two million, one hundred fifty-four thousand, one hundred fifteen".