8130557 has 4 divisors (see below), whose sum is σ = 8154336. Its totient is φ = 8106780.

The previous prime is 8130553. The next prime is 8130581. The reversal of 8130557 is 7550318.

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 8130557 - 2² = 8130553 is a prime.

It is a super-2 number, since 2×8130557² = 132211914260498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8130553) 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, 11369 + ... + 12062.

It is an arithmetic number, because the mean of its divisors is an integer number (2038584).

Almost surely, 2^8130557 is an apocalyptic number.

It is an amenable number.

8130557 is a deficient number, since it is larger than the sum of its proper divisors (23779).

8130557 is a wasteful number, since it uses less digits than its factorization.

8130557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23778.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 8130557 is about 2851.4131584181. The cubic root of 8130557 is about 201.0821096345.

Subtracting from 8130557 its sum of digits (29), we obtain a triangular number (8130528 = T₄₀₃₂).

The spelling of 8130557 in words is "eight million, one hundred thirty thousand, five hundred fifty-seven".