55237555 has 4 divisors (see below), whose sum is σ = 66285072. Its totient is φ = 44190040.

The previous prime is 55237531. The next prime is 55237571. The reversal of 55237555 is 55573255.

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

It is not a de Polignac number, because 55237555 - 2⁹ = 55237043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5523751 + ... + 5523760.

It is an arithmetic number, because the mean of its divisors is an integer number (16571268).

Almost surely, 2^55237555 is an apocalyptic number.

55237555 is a deficient number, since it is larger than the sum of its proper divisors (11047517).

55237555 is a wasteful number, since it uses less digits than its factorization.

55237555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11047516.

The product of its digits is 131250, while the sum is 37.

The square root of 55237555 is about 7432.1971852205. The cubic root of 55237555 is about 380.8419811181.

The spelling of 55237555 in words is "fifty-five million, two hundred thirty-seven thousand, five hundred fifty-five".