251066055 has 24 divisors (see below), whose sum is σ = 415105776. Its totient is φ = 129575040.

The previous prime is 251066051. The next prime is 251066069. The reversal of 251066055 is 550660152.

It is not a de Polignac number, because 251066055 - 2² = 251066051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251066051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5707 + ... + 23123.

It is an arithmetic number, because the mean of its divisors is an integer number (17296074).

Almost surely, 2^251066055 is an apocalyptic number.

251066055 is a deficient number, since it is larger than the sum of its proper divisors (164039721).

251066055 is a wasteful number, since it uses less digits than its factorization.

251066055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17487 (or 17456 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 251066055 is about 15845.0640579330. The cubic root of 251066055 is about 630.8546852737.

The spelling of 251066055 in words is "two hundred fifty-one million, sixty-six thousand, fifty-five".