73231573 has 2 divisors, whose sum is σ = 73231574. Its totient is φ = 73231572.

The previous prime is 73231523. The next prime is 73231577. The reversal of 73231573 is 37513237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40030929 + 33200644 = 6327^2 + 5762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73231573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73231577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36615786 + 36615787.

It is an arithmetic number, because the mean of its divisors is an integer number (36615787).

Almost surely, 2^73231573 is an apocalyptic number.

It is an amenable number.

73231573 is a deficient number, since it is larger than the sum of its proper divisors (1).

73231573 is an equidigital number, since it uses as much as digits as its factorization.

73231573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13230, while the sum is 31.

The square root of 73231573 is about 8557.5447997659. The cubic root of 73231573 is about 418.3753810672.

The spelling of 73231573 in words is "seventy-three million, two hundred thirty-one thousand, five hundred seventy-three".