8157557 has 8 divisors (see below), whose sum is σ = 8455680. Its totient is φ = 7861680.

The previous prime is 8157553. The next prime is 8157559. The reversal of 8157557 is 7557518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8157557 - 2² = 8157553 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 8157557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8157553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10763 + ... + 11495.

It is an arithmetic number, because the mean of its divisors is an integer number (1056960).

Almost surely, 2^8157557 is an apocalyptic number.

It is an amenable number.

8157557 is a deficient number, since it is larger than the sum of its proper divisors (298123).

8157557 is a wasteful number, since it uses less digits than its factorization.

8157557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123.

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

The square root of 8157557 is about 2856.1437288764. The cubic root of 8157557 is about 201.3044485727.

The spelling of 8157557 in words is "eight million, one hundred fifty-seven thousand, five hundred fifty-seven".