72155651 has 2 divisors, whose sum is σ = 72155652. Its totient is φ = 72155650.

The previous prime is 72155627. The next prime is 72155653. The reversal of 72155651 is 15655127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72155651 - 2²⁶ = 5046787 is a prime.

Together with 72155653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72155653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36077825 + 36077826.

It is an arithmetic number, because the mean of its divisors is an integer number (36077826).

Almost surely, 2^72155651 is an apocalyptic number.

72155651 is a deficient number, since it is larger than the sum of its proper divisors (1).

72155651 is an equidigital number, since it uses as much as digits as its factorization.

72155651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 32.

The square root of 72155651 is about 8494.4482457662. The cubic root of 72155651 is about 416.3163332199.

The spelling of 72155651 in words is "seventy-two million, one hundred fifty-five thousand, six hundred fifty-one".