55559251 has 4 divisors (see below), whose sum is σ = 60610104. Its totient is φ = 50508400.

The previous prime is 55559233. The next prime is 55559279. The reversal of 55559251 is 15295555.

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 55559251 - 2²¹ = 53462099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55559251.

It is not an unprimeable number, because it can be changed into a prime (55559221) 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, 2525410 + ... + 2525431.

It is an arithmetic number, because the mean of its divisors is an integer number (15152526).

Almost surely, 2^55559251 is an apocalyptic number.

55559251 is a deficient number, since it is larger than the sum of its proper divisors (5050853).

55559251 is a wasteful number, since it uses less digits than its factorization.

55559251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050852.

The product of its digits is 56250, while the sum is 37.

The square root of 55559251 is about 7453.8078188266. The cubic root of 55559251 is about 381.5798744526.

The spelling of 55559251 in words is "fifty-five million, five hundred fifty-nine thousand, two hundred fifty-one".