251054749 has 8 divisors (see below), whose sum is σ = 274366080. Its totient is φ = 227824800.

The previous prime is 251054717. The next prime is 251054789. The reversal of 251054749 is 947450152.

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 251054749 - 2⁵ = 251054717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251054789) 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, 13797 + ... + 26314.

It is an arithmetic number, because the mean of its divisors is an integer number (34295760).

Almost surely, 2^251054749 is an apocalyptic number.

It is an amenable number.

251054749 is a deficient number, since it is larger than the sum of its proper divisors (23311331).

251054749 is a wasteful number, since it uses less digits than its factorization.

251054749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40691.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 251054749 is about 15844.7072866620. The cubic root of 251054749 is about 630.8452155877.

The spelling of 251054749 in words is "two hundred fifty-one million, fifty-four thousand, seven hundred forty-nine".