81230475 has 12 divisors (see below), whose sum is σ = 134301176. Its totient is φ = 43322880.

The previous prime is 81230449. The next prime is 81230477. The reversal of 81230475 is 57403218.

It is not a de Polignac number, because 81230475 - 2⁹ = 81229963 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81230477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 541462 + ... + 541611.

Almost surely, 2^81230475 is an apocalyptic number.

81230475 is a deficient number, since it is larger than the sum of its proper divisors (53070701).

81230475 is a wasteful number, since it uses less digits than its factorization.

81230475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083086 (or 1083081 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 81230475 is about 9012.7950714526. The cubic root of 81230475 is about 433.0848559043.

The spelling of 81230475 in words is "eighty-one million, two hundred thirty thousand, four hundred seventy-five".