85615573 has 2 divisors, whose sum is σ = 85615574. Its totient is φ = 85615572.

The previous prime is 85615567. The next prime is 85615589. The reversal of 85615573 is 37551658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84309124 + 1306449 = 9182^2 + 1143^2 .

It is a cyclic number.

It is not a de Polignac number, because 85615573 - 2¹⁷ = 85484501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85612573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42807786 + 42807787.

It is an arithmetic number, because the mean of its divisors is an integer number (42807787).

Almost surely, 2^85615573 is an apocalyptic number.

It is an amenable number.

85615573 is a deficient number, since it is larger than the sum of its proper divisors (1).

85615573 is an equidigital number, since it uses as much as digits as its factorization.

85615573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 40.

The square root of 85615573 is about 9252.8683660798. The cubic root of 85615573 is about 440.7418150989.

The spelling of 85615573 in words is "eighty-five million, six hundred fifteen thousand, five hundred seventy-three".