72151619 has 2 divisors, whose sum is σ = 72151620. Its totient is φ = 72151618.

The previous prime is 72151589. The next prime is 72151633. The reversal of 72151619 is 91615127.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72151619 is a prime.

It is a super-2 number, since 2×72151619² = 10411712248642322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (72151649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36075809 + 36075810.

It is an arithmetic number, because the mean of its divisors is an integer number (36075810).

Almost surely, 2^72151619 is an apocalyptic number.

72151619 is a deficient number, since it is larger than the sum of its proper divisors (1).

72151619 is an equidigital number, since it uses as much as digits as its factorization.

72151619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 32.

The square root of 72151619 is about 8494.2109109675. The cubic root of 72151619 is about 416.3085786010.

The spelling of 72151619 in words is "seventy-two million, one hundred fifty-one thousand, six hundred nineteen".