55993558 has 4 divisors (see below), whose sum is σ = 83990340. Its totient is φ = 27996778.

The previous prime is 55993501. The next prime is 55993559. The reversal of 55993558 is 85539955.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55993559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13998388 + ... + 13998391.

It is an arithmetic number, because the mean of its divisors is an integer number (20997585).

Almost surely, 2^55993558 is an apocalyptic number.

55993558 is a deficient number, since it is larger than the sum of its proper divisors (27996782).

55993558 is a wasteful number, since it uses less digits than its factorization.

55993558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27996781.

The product of its digits is 1215000, while the sum is 49.

The square root of 55993558 is about 7482.8843369385. The cubic root of 55993558 is about 382.5715656316.

The spelling of 55993558 in words is "fifty-five million, nine hundred ninety-three thousand, five hundred fifty-eight".