251222055 has 16 divisors (see below), whose sum is σ = 459377664. Its totient is φ = 114844320.

The previous prime is 251222053. The next prime is 251222057. The reversal of 251222055 is 550222152.

It is an interprime number because it is at equal distance from previous prime (251222053) and next prime (251222057).

It is not a de Polignac number, because 251222055 - 2¹ = 251222053 is a prime.

It is a super-2 number, since 2×251222055² = 126225041836846050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251222051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1196191 + ... + 1196400.

It is an arithmetic number, because the mean of its divisors is an integer number (28711104).

Almost surely, 2^251222055 is an apocalyptic number.

251222055 is a deficient number, since it is larger than the sum of its proper divisors (208155609).

251222055 is a wasteful number, since it uses less digits than its factorization.

251222055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392606.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 251222055 is about 15849.9859621389. The cubic root of 251222055 is about 630.9853188300.

The spelling of 251222055 in words is "two hundred fifty-one million, two hundred twenty-two thousand, fifty-five".