85522013 has 2 divisors, whose sum is σ = 85522014. Its totient is φ = 85522012.

The previous prime is 85522007. The next prime is 85522049. The reversal of 85522013 is 31022558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76510009 + 9012004 = 8747^2 + 3002^2 .

It is a cyclic number.

It is not a de Polignac number, because 85522013 - 2⁸ = 85521757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85522513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42761006 + 42761007.

It is an arithmetic number, because the mean of its divisors is an integer number (42761007).

Almost surely, 2^85522013 is an apocalyptic number.

It is an amenable number.

85522013 is a deficient number, since it is larger than the sum of its proper divisors (1).

85522013 is an equidigital number, since it uses as much as digits as its factorization.

85522013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 85522013 is about 9247.8112545618. The cubic root of 85522013 is about 440.5812102284.

The spelling of 85522013 in words is "eighty-five million, five hundred twenty-two thousand, thirteen".