55998251 has 4 divisors (see below), whose sum is σ = 57364104. Its totient is φ = 54632400.

The previous prime is 55998247. The next prime is 55998253. The reversal of 55998251 is 15289955.

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

It is a cyclic number.

It is not a de Polignac number, because 55998251 - 2² = 55998247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55998253) 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, 682865 + ... + 682946.

It is an arithmetic number, because the mean of its divisors is an integer number (14341026).

Almost surely, 2^55998251 is an apocalyptic number.

55998251 is a deficient number, since it is larger than the sum of its proper divisors (1365853).

55998251 is a wasteful number, since it uses less digits than its factorization.

55998251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365852.

The product of its digits is 162000, while the sum is 44.

The square root of 55998251 is about 7483.1979126574. The cubic root of 55998251 is about 382.5822535170.

The spelling of 55998251 in words is "fifty-five million, nine hundred ninety-eight thousand, two hundred fifty-one".