72556323 has 32 divisors (see below), whose sum is σ = 117863424. Its totient is φ = 38756352.

The previous prime is 72556321. The next prime is 72556327. The reversal of 72556323 is 32365527.

It is a Cunningham number, because it is equal to 8518²-1.

It is not a de Polignac number, because 72556323 - 2¹ = 72556321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72556321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59011 + ... + 60227.

It is an arithmetic number, because the mean of its divisors is an integer number (3683232).

Almost surely, 2^72556323 is an apocalyptic number.

72556323 is a deficient number, since it is larger than the sum of its proper divisors (45307101).

72556323 is a wasteful number, since it uses less digits than its factorization.

72556323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411.

The product of its digits is 37800, while the sum is 33.

The square root of 72556323 is about 8517.9999413008. Note that the first 4 decimals coincide. The cubic root of 72556323 is about 417.0854967919.

The spelling of 72556323 in words is "seventy-two million, five hundred fifty-six thousand, three hundred twenty-three".