72157371 has 64 divisors (see below), whose sum is σ = 120766464. Its totient is φ = 37699200.

The previous prime is 72157339. The next prime is 72157387. The reversal of 72157371 is 17375127.

It is not a de Polignac number, because 72157371 - 2⁵ = 72157339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (72157301) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 700506 + ... + 700608.

It is an arithmetic number, because the mean of its divisors is an integer number (1886976).

Almost surely, 2^72157371 is an apocalyptic number.

72157371 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

72157371 is a deficient number, since it is larger than the sum of its proper divisors (48609093).

72157371 is a wasteful number, since it uses less digits than its factorization.

72157371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224.

The product of its digits is 10290, while the sum is 33.

The square root of 72157371 is about 8494.5494877598. The cubic root of 72157371 is about 416.3196411539.

The spelling of 72157371 in words is "seventy-two million, one hundred fifty-seven thousand, three hundred seventy-one".