251042055 has 32 divisors (see below), whose sum is σ = 439464960. Its totient is φ = 121361280.

The previous prime is 251042047. The next prime is 251042059. The reversal of 251042055 is 550240152.

It is a happy number.

It is not a de Polignac number, because 251042055 - 2³ = 251042047 is a prime.

It is a super-2 number, since 2×251042055² = 126044226757246050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251042059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59506 + ... + 63584.

It is an arithmetic number, because the mean of its divisors is an integer number (13733280).

Almost surely, 2^251042055 is an apocalyptic number.

251042055 is a deficient number, since it is larger than the sum of its proper divisors (188422905).

251042055 is a wasteful number, since it uses less digits than its factorization.

251042055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4471.

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

The square root of 251042055 is about 15844.3067061958. The cubic root of 251042055 is about 630.8345830010.

The spelling of 251042055 in words is "two hundred fifty-one million, forty-two thousand, fifty-five".