85431275 has 6 divisors (see below), whose sum is σ = 105934812. Its totient is φ = 68345000.

The previous prime is 85431271. The next prime is 85431287. The reversal of 85431275 is 57213458.

It is a happy number.

It is not a de Polignac number, because 85431275 - 2² = 85431271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85431271) 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, 1708601 + ... + 1708650.

It is an arithmetic number, because the mean of its divisors is an integer number (17655802).

Almost surely, 2^85431275 is an apocalyptic number.

85431275 is a deficient number, since it is larger than the sum of its proper divisors (20503537).

85431275 is a wasteful number, since it uses less digits than its factorization.

85431275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417261 (or 3417256 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 85431275 is about 9242.9040349881. The cubic root of 85431275 is about 440.4253376705.

The spelling of 85431275 in words is "eighty-five million, four hundred thirty-one thousand, two hundred seventy-five".