85253489831 has 2 divisors, whose sum is σ = 85253489832. Its totient is φ = 85253489830.

The previous prime is 85253489759. The next prime is 85253489891. The reversal of 85253489831 is 13898435258.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85253489831 - 2¹⁰ = 85253488807 is a prime.

It is a super-2 number, since 2×85253489831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85253489891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42626744915 + 42626744916.

It is an arithmetic number, because the mean of its divisors is an integer number (42626744916).

Almost surely, 2^85253489831 is an apocalyptic number.

85253489831 is a deficient number, since it is larger than the sum of its proper divisors (1).

85253489831 is an equidigital number, since it uses as much as digits as its factorization.

85253489831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8294400, while the sum is 56.

The spelling of 85253489831 in words is "eighty-five billion, two hundred fifty-three million, four hundred eighty-nine thousand, eight hundred thirty-one".