55893557 has 4 divisors (see below), whose sum is σ = 55909056. Its totient is φ = 55878060.

The previous prime is 55893547. The next prime is 55893571. The reversal of 55893557 is 75539855.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75539855 = 5 ⋅15107971.

It is a cyclic number.

It is not a de Polignac number, because 55893557 - 2⁶ = 55893493 is a prime.

It is a super-2 number, since 2×55893557² = 6248179428224498, 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 (55893517) 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, 818 + ... + 10604.

It is an arithmetic number, because the mean of its divisors is an integer number (13977264).

Almost surely, 2^55893557 is an apocalyptic number.

It is an amenable number.

55893557 is a deficient number, since it is larger than the sum of its proper divisors (15499).

55893557 is an equidigital number, since it uses as much as digits as its factorization.

55893557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15498.

The product of its digits is 945000, while the sum is 47.

The square root of 55893557 is about 7476.1993686632. The cubic root of 55893557 is about 382.3436802681.

The spelling of 55893557 in words is "fifty-five million, eight hundred ninety-three thousand, five hundred fifty-seven".