72157519 has 8 divisors (see below), whose sum is σ = 82517120. Its totient is φ = 61810776.

The previous prime is 72157493. The next prime is 72157523. The reversal of 72157519 is 91575127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72157519 - 2¹¹ = 72155471 is a prime.

It is a super-2 number, since 2×72157519² = 10413415096470722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72157559) 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, 20512 + ... + 23770.

It is an arithmetic number, because the mean of its divisors is an integer number (10314640).

Almost surely, 2^72157519 is an apocalyptic number.

72157519 is a deficient number, since it is larger than the sum of its proper divisors (10359601).

72157519 is a wasteful number, since it uses less digits than its factorization.

72157519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429.

The product of its digits is 22050, while the sum is 37.

The square root of 72157519 is about 8494.5581992238. The cubic root of 72157519 is about 416.3199257877.

The spelling of 72157519 in words is "seventy-two million, one hundred fifty-seven thousand, five hundred nineteen".