55555544251 has 8 divisors (see below), whose sum is σ = 56026969920. Its totient is φ = 55085908488.

The previous prime is 55555544237. The next prime is 55555544287. The reversal of 55555544251 is 15244555555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55555544251 - 2⁹ = 55555543739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55555544221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385101 + ... + 509326.

It is an arithmetic number, because the mean of its divisors is an integer number (7003371240).

Almost surely, 2^55555544251 is an apocalyptic number.

55555544251 is a deficient number, since it is larger than the sum of its proper divisors (471425669).

55555544251 is a wasteful number, since it uses less digits than its factorization.

55555544251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894953.

The product of its digits is 2500000, while the sum is 46.

The spelling of 55555544251 in words is "fifty-five billion, five hundred fifty-five million, five hundred forty-four thousand, two hundred fifty-one".