72431474233 has 2 divisors, whose sum is σ = 72431474234. Its totient is φ = 72431474232.

The previous prime is 72431474119. The next prime is 72431474251. The reversal of 72431474233 is 33247413427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64664929849 + 7766544384 = 254293^2 + 88128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72431474233 is a prime.

It is not a weakly prime, because it can be changed into another prime (72431474033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36215737116 + 36215737117.

It is an arithmetic number, because the mean of its divisors is an integer number (36215737117).

Almost surely, 2^72431474233 is an apocalyptic number.

It is an amenable number.

72431474233 is a deficient number, since it is larger than the sum of its proper divisors (1).

72431474233 is an equidigital number, since it uses as much as digits as its factorization.

72431474233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 40.

The spelling of 72431474233 in words is "seventy-two billion, four hundred thirty-one million, four hundred seventy-four thousand, two hundred thirty-three".