85131457 has 16 divisors (see below), whose sum is σ = 92776320. Its totient is φ = 77846400.

The previous prime is 85131451. The next prime is 85131467. The reversal of 85131457 is 75413158.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 85131457 - 2¹¹ = 85129409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85131451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79707 + ... + 80767.

It is an arithmetic number, because the mean of its divisors is an integer number (5798520).

Almost surely, 2^85131457 is an apocalyptic number.

It is an amenable number.

85131457 is a deficient number, since it is larger than the sum of its proper divisors (7644863).

85131457 is a wasteful number, since it uses less digits than its factorization.

85131457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224.

The product of its digits is 16800, while the sum is 34.

The square root of 85131457 is about 9226.6709597774. The cubic root of 85131457 is about 439.9095147954.

The spelling of 85131457 in words is "eighty-five million, one hundred thirty-one thousand, four hundred fifty-seven".