72157151 has 4 divisors (see below), whose sum is σ = 78716904. Its totient is φ = 65597400.

The previous prime is 72157121. The next prime is 72157159. The reversal of 72157151 is 15175127.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 72157151 - 2¹⁴ = 72140767 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 (72157159) 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, 3279860 + ... + 3279881.

It is an arithmetic number, because the mean of its divisors is an integer number (19679226).

Almost surely, 2^72157151 is an apocalyptic number.

72157151 is a deficient number, since it is larger than the sum of its proper divisors (6559753).

72157151 is a wasteful number, since it uses less digits than its factorization.

72157151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6559752.

The product of its digits is 2450, while the sum is 29.

The square root of 72157151 is about 8494.5365382698. The cubic root of 72157151 is about 416.3192180490.

The spelling of 72157151 in words is "seventy-two million, one hundred fifty-seven thousand, one hundred fifty-one".