72155151 has 8 divisors (see below), whose sum is σ = 106896560. Its totient is φ = 48103416.

The previous prime is 72155113. The next prime is 72155183. The reversal of 72155151 is 15155127.

It is not a de Polignac number, because 72155151 - 2⁶ = 72155087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2672413 = 72155151 / (7 + 2 + 1 + 5 + 5 + 1 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72155351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336180 + ... + 1336233.

It is an arithmetic number, because the mean of its divisors is an integer number (13362070).

Almost surely, 2^72155151 is an apocalyptic number.

72155151 is a deficient number, since it is larger than the sum of its proper divisors (34741409).

72155151 is a wasteful number, since it uses less digits than its factorization.

72155151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2672422 (or 2672416 counting only the distinct ones).

The product of its digits is 1750, while the sum is 27.

The square root of 72155151 is about 8494.4188147277. The cubic root of 72155151 is about 416.3153716013.

The spelling of 72155151 in words is "seventy-two million, one hundred fifty-five thousand, one hundred fifty-one".