81230275 has 12 divisors (see below), whose sum is σ = 115115152. Its totient is φ = 55700640.

The previous prime is 81230269. The next prime is 81230287. The reversal of 81230275 is 57203218.

It is not a de Polignac number, because 81230275 - 2²¹ = 79133123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 231912 + ... + 232261.

Almost surely, 2^81230275 is an apocalyptic number.

81230275 is a deficient number, since it is larger than the sum of its proper divisors (33884877).

81230275 is a wasteful number, since it uses less digits than its factorization.

81230275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464190 (or 464185 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 81230275 is about 9012.7839761086. The cubic root of 81230275 is about 433.0845004669.

The spelling of 81230275 in words is "eighty-one million, two hundred thirty thousand, two hundred seventy-five".