8133557 has 4 divisors (see below), whose sum is σ = 8266956. Its totient is φ = 8000160.

The previous prime is 8133533. The next prime is 8133569. The reversal of 8133557 is 7553318.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7553318 = 2 ⋅3776659.

It can be written as a sum of positive squares in 2 ways, for example, as 4157521 + 3976036 = 2039^2 + 1994^2 .

It is a cyclic number.

It is not a de Polignac number, because 8133557 - 2¹⁴ = 8117173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8133527) 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, 66608 + ... + 66729.

It is an arithmetic number, because the mean of its divisors is an integer number (2066739).

Almost surely, 2^8133557 is an apocalyptic number.

It is an amenable number.

8133557 is a deficient number, since it is larger than the sum of its proper divisors (133399).

8133557 is a wasteful number, since it uses less digits than its factorization.

8133557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133398.

The product of its digits is 12600, while the sum is 32.

The square root of 8133557 is about 2851.9391648491. The cubic root of 8133557 is about 201.1068382457.

The spelling of 8133557 in words is "eight million, one hundred thirty-three thousand, five hundred fifty-seven".