55424216251 has 4 divisors (see below), whose sum is σ = 55828772712. Its totient is φ = 55019659792.

The previous prime is 55424216231. The next prime is 55424216269. The reversal of 55424216251 is 15261242455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15261242455 = 5 ⋅3052248491.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55424216251 is a prime.

It is a super-2 number, since 2×55424216251² (a number of 22 digits) contains 22 as substring.

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 55424216251.

It is not an unprimeable number, because it can be changed into a prime (55424216231) 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, 202278025 + ... + 202278298.

It is an arithmetic number, because the mean of its divisors is an integer number (13957193178).

Almost surely, 2^55424216251 is an apocalyptic number.

55424216251 is a deficient number, since it is larger than the sum of its proper divisors (404556461).

55424216251 is a wasteful number, since it uses less digits than its factorization.

55424216251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404556460.

The product of its digits is 96000, while the sum is 37.

The spelling of 55424216251 in words is "fifty-five billion, four hundred twenty-four million, two hundred sixteen thousand, two hundred fifty-one".