72056191 has 2 divisors, whose sum is σ = 72056192. Its totient is φ = 72056190.

The previous prime is 72056161. The next prime is 72056233. The reversal of 72056191 is 19165027.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72056191 - 2⁷ = 72056063 is a prime.

It is a super-2 number, since 2×72056191² = 10384189322856962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72056111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36028095 + 36028096.

It is an arithmetic number, because the mean of its divisors is an integer number (36028096).

Almost surely, 2^72056191 is an apocalyptic number.

72056191 is a deficient number, since it is larger than the sum of its proper divisors (1).

72056191 is an equidigital number, since it uses as much as digits as its factorization.

72056191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 72056191 is about 8488.5918149007. The cubic root of 72056191 is about 416.1249605337.

The spelling of 72056191 in words is "seventy-two million, fifty-six thousand, one hundred ninety-one".