85107557 has 4 divisors (see below), whose sum is σ = 85129440. Its totient is φ = 85085676.

The previous prime is 85107541. The next prime is 85107563. The reversal of 85107557 is 75570158.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85107557 - 2⁴ = 85107541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85107557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85107577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353 + ... + 13470.

It is an arithmetic number, because the mean of its divisors is an integer number (21282360).

Almost surely, 2^85107557 is an apocalyptic number.

It is an amenable number.

85107557 is a deficient number, since it is larger than the sum of its proper divisors (21883).

85107557 is a wasteful number, since it uses less digits than its factorization.

85107557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21882.

The product of its (nonzero) digits is 49000, while the sum is 38.

The square root of 85107557 is about 9225.3757105063. The cubic root of 85107557 is about 439.8683438744.

The spelling of 85107557 in words is "eighty-five million, one hundred seven thousand, five hundred fifty-seven".