72143015 has 16 divisors (see below), whose sum is σ = 99382080. Its totient is φ = 49248000.

The previous prime is 72143011. The next prime is 72143023. The reversal of 72143015 is 51034127.

It is not a de Polignac number, because 72143015 - 2² = 72143011 is a prime.

It is a super-2 number, since 2×72143015² = 10409229226580450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72143011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3515 + ... + 12515.

It is an arithmetic number, because the mean of its divisors is an integer number (6211380).

Almost surely, 2^72143015 is an apocalyptic number.

72143015 is a deficient number, since it is larger than the sum of its proper divisors (27239065).

72143015 is a wasteful number, since it uses less digits than its factorization.

72143015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9242.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 72143015 is about 8493.7044332847. The cubic root of 72143015 is about 416.2920298321.

The spelling of 72143015 in words is "seventy-two million, one hundred forty-three thousand, fifteen".