72150015 has 32 divisors (see below), whose sum is σ = 132387840. Its totient is φ = 32868864.

The previous prime is 72149983. The next prime is 72150047. The reversal of 72150015 is 51005127.

It is an interprime number because it is at equal distance from previous prime (72149983) and next prime (72150047).

It is not a de Polignac number, because 72150015 - 2⁵ = 72149983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 72149973 and 72150000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34366 + ... + 36404.

It is an arithmetic number, because the mean of its divisors is an integer number (4137120).

Almost surely, 2^72150015 is an apocalyptic number.

72150015 is a deficient number, since it is larger than the sum of its proper divisors (60237825).

72150015 is a wasteful number, since it uses less digits than its factorization.

72150015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 72150015 is about 8494.1164931969. The cubic root of 72150015 is about 416.3054935979.

The spelling of 72150015 in words is "seventy-two million, one hundred fifty thousand, fifteen".