81114525 has 18 divisors (see below), whose sum is σ = 145285530. Its totient is φ = 43260960.

The previous prime is 81114499. The next prime is 81114533. The reversal of 81114525 is 52541118.

It can be written as a sum of positive squares in 3 ways, for example, as 60516 + 81054009 = 246^2 + 9003^2 .

It is not a de Polignac number, because 81114525 - 2⁵ = 81114493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 180030 + ... + 180479.

Almost surely, 2^81114525 is an apocalyptic number.

It is an amenable number.

81114525 is a deficient number, since it is larger than the sum of its proper divisors (64171005).

81114525 is a wasteful number, since it uses less digits than its factorization.

81114525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360525 (or 360517 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 81114525 is about 9006.3602526215. The cubic root of 81114525 is about 432.8786931261.

The spelling of 81114525 in words is "eighty-one million, one hundred fourteen thousand, five hundred twenty-five".