72152519 has 4 divisors (see below), whose sum is σ = 75950040. Its totient is φ = 68355000.

The previous prime is 72152513. The next prime is 72152527. The reversal of 72152519 is 91525127.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72152519 - 2⁴ = 72152503 is a prime.

It is a super-2 number, since 2×72152519² = 10411971996090722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72152513) 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, 1898732 + ... + 1898769.

It is an arithmetic number, because the mean of its divisors is an integer number (18987510).

Almost surely, 2^72152519 is an apocalyptic number.

72152519 is a deficient number, since it is larger than the sum of its proper divisors (3797521).

72152519 is a wasteful number, since it uses less digits than its factorization.

72152519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3797520.

The product of its digits is 6300, while the sum is 32.

The square root of 72152519 is about 8494.2638880600. The cubic root of 72152519 is about 416.3103095677.

The spelling of 72152519 in words is "seventy-two million, one hundred fifty-two thousand, five hundred nineteen".