72556951 has 2 divisors, whose sum is σ = 72556952. Its totient is φ = 72556950.

The previous prime is 72556949. The next prime is 72556987. The reversal of 72556951 is 15965527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72556951 - 2¹ = 72556949 is a prime.

It is a super-2 number, since 2×72556951² = 10529022276832802, which contains 22 as substring.

Together with 72556949, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72556931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36278475 + 36278476.

It is an arithmetic number, because the mean of its divisors is an integer number (36278476).

Almost surely, 2^72556951 is an apocalyptic number.

72556951 is a deficient number, since it is larger than the sum of its proper divisors (1).

72556951 is an equidigital number, since it uses as much as digits as its factorization.

72556951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94500, while the sum is 40.

The square root of 72556951 is about 8518.0368043347. The cubic root of 72556951 is about 417.0867001280.

The spelling of 72556951 in words is "seventy-two million, five hundred fifty-six thousand, nine hundred fifty-one".