81452583 has 6 divisors (see below), whose sum is σ = 117653744. Its totient is φ = 54301716.

The previous prime is 81452537. The next prime is 81452611. The reversal of 81452583 is 38525418.

It is a happy number.

It is not a de Polignac number, because 81452583 - 2⁶ = 81452519 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81452983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4525135 + ... + 4525152.

Almost surely, 2^81452583 is an apocalyptic number.

81452583 is a deficient number, since it is larger than the sum of its proper divisors (36201161).

81452583 is a wasteful number, since it uses less digits than its factorization.

81452583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9050293 (or 9050290 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 81452583 is about 9025.1084758024. The cubic root of 81452583 is about 433.4792237901.

The spelling of 81452583 in words is "eighty-one million, four hundred fifty-two thousand, five hundred eighty-three".