55598 has 4 divisors (see below), whose sum is σ = 83400. Its totient is φ = 27798.

The previous prime is 55589. The next prime is 55603. The reversal of 55598 is 89555.

55598 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89555 = 5 ⋅17911.

It is a super-2 number, since 2×55598² = 6182275208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

55598 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13898 + ... + 13901.

It is an arithmetic number, because the mean of its divisors is an integer number (20850).

2⁵⁵⁵⁹⁸ is an apocalyptic number.

55598 is a deficient number, since it is larger than the sum of its proper divisors (27802).

55598 is a wasteful number, since it uses less digits than its factorization.

55598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27801.

The product of its digits is 9000, while the sum is 32.

The square root of 55598 is about 235.7922814682. The cubic root of 55598 is about 38.1668562968.

The spelling of 55598 in words is "fifty-five thousand, five hundred ninety-eight".