85802131 has 2 divisors, whose sum is σ = 85802132. Its totient is φ = 85802130.

The previous prime is 85802099. The next prime is 85802147. The reversal of 85802131 is 13120858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85802131 - 2⁵ = 85802099 is a prime.

It is a super-2 number, since 2×85802131² = 14724011368282322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85802131.

It is not a weakly prime, because it can be changed into another prime (85802191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42901065 + 42901066.

It is an arithmetic number, because the mean of its divisors is an integer number (42901066).

Almost surely, 2^85802131 is an apocalyptic number.

85802131 is a deficient number, since it is larger than the sum of its proper divisors (1).

85802131 is an equidigital number, since it uses as much as digits as its factorization.

85802131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 85802131 is about 9262.9439704664. The cubic root of 85802131 is about 441.0617111893.

Adding to 85802131 its reverse (13120858), we get a palindrome (98922989).

The spelling of 85802131 in words is "eighty-five million, eight hundred two thousand, one hundred thirty-one".