55865251 has 4 divisors (see below), whose sum is σ = 60162592. Its totient is φ = 51567912.

The previous prime is 55865239. The next prime is 55865269. The reversal of 55865251 is 15256855.

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 55865251 - 2⁷ = 55865123 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 55865251.

It is not an unprimeable number, because it can be changed into a prime (55862251) 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, 2148651 + ... + 2148676.

It is an arithmetic number, because the mean of its divisors is an integer number (15040648).

Almost surely, 2^55865251 is an apocalyptic number.

55865251 is a deficient number, since it is larger than the sum of its proper divisors (4297341).

55865251 is a wasteful number, since it uses less digits than its factorization.

55865251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4297340.

The product of its digits is 60000, while the sum is 37.

The square root of 55865251 is about 7474.3060547451. The cubic root of 55865251 is about 382.2791263298.

The spelling of 55865251 in words is "fifty-five million, eight hundred sixty-five thousand, two hundred fifty-one".