85146631 has 2 divisors, whose sum is σ = 85146632. Its totient is φ = 85146630.

The previous prime is 85146623. The next prime is 85146637. The reversal of 85146631 is 13664158.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85146631 - 2³ = 85146623 is a prime.

It is a super-2 number, since 2×85146631² = 14499897541300322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85146637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42573315 + 42573316.

It is an arithmetic number, because the mean of its divisors is an integer number (42573316).

Almost surely, 2^85146631 is an apocalyptic number.

85146631 is a deficient number, since it is larger than the sum of its proper divisors (1).

85146631 is an equidigital number, since it uses as much as digits as its factorization.

85146631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 85146631 is about 9227.4932132189. The cubic root of 85146631 is about 439.9356500245.

The spelling of 85146631 in words is "eighty-five million, one hundred forty-six thousand, six hundred thirty-one".