251224020055 has 8 divisors (see below), whose sum is σ = 317335604400. Its totient is φ = 190401362496.

The previous prime is 251224020037. The next prime is 251224020059. The reversal of 251224020055 is 550020422152.

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 251224020055 - 2¹¹ = 251224018007 is a prime.

It is a super-2 number, since 2×251224020055² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251224020059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1322231590 + ... + 1322231779.

It is an arithmetic number, because the mean of its divisors is an integer number (39666950550).

Almost surely, 2^251224020055 is an apocalyptic number.

251224020055 is a deficient number, since it is larger than the sum of its proper divisors (66111584345).

251224020055 is a wasteful number, since it uses less digits than its factorization.

251224020055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644463393.

The product of its (nonzero) digits is 8000, while the sum is 28.

The spelling of 251224020055 in words is "two hundred fifty-one billion, two hundred twenty-four million, twenty thousand, fifty-five".