72257151 has 4 divisors (see below), whose sum is σ = 96342872. Its totient is φ = 48171432.

The previous prime is 72257149. The next prime is 72257153. The reversal of 72257151 is 15175227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15175227 = 3 ⋅5058409.

It is an interprime number because it is at equal distance from previous prime (72257149) and next prime (72257153).

It is not a de Polignac number, because 72257151 - 2¹ = 72257149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72257153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12042856 + ... + 12042861.

It is an arithmetic number, because the mean of its divisors is an integer number (24085718).

Almost surely, 2^72257151 is an apocalyptic number.

72257151 is a deficient number, since it is larger than the sum of its proper divisors (24085721).

72257151 is a wasteful number, since it uses less digits than its factorization.

72257151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24085720.

The product of its digits is 4900, while the sum is 30.

The square root of 72257151 is about 8500.4206366509. The cubic root of 72257151 is about 416.5114498836.

The spelling of 72257151 in words is "seventy-two million, two hundred fifty-seven thousand, one hundred fifty-one".