5618557 has 4 divisors (see below), whose sum is σ = 6421216. Its totient is φ = 4815900.

The previous prime is 5618549. The next prime is 5618567. The reversal of 5618557 is 7558165.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7558165 = 5 ⋅1511633.

It is a cyclic number.

It is not a de Polignac number, because 5618557 - 2³ = 5618549 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 (5618537) 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, 401319 + ... + 401332.

It is an arithmetic number, because the mean of its divisors is an integer number (1605304).

Almost surely, 2^5618557 is an apocalyptic number.

It is an amenable number.

5618557 is a deficient number, since it is larger than the sum of its proper divisors (802659).

5618557 is an equidigital number, since it uses as much as digits as its factorization.

5618557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802658.

The product of its digits is 42000, while the sum is 37.

The square root of 5618557 is about 2370.3495522813. The cubic root of 5618557 is about 177.7767368718.

The spelling of 5618557 in words is "five million, six hundred eighteen thousand, five hundred fifty-seven".