251270493 has 16 divisors (see below), whose sum is σ = 339490176. Its totient is φ = 165297600.

The previous prime is 251270477. The next prime is 251270501. The reversal of 251270493 is 394072152.

It is not a de Polignac number, because 251270493 - 2⁴ = 251270477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251270473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69355 + ... + 72887.

It is an arithmetic number, because the mean of its divisors is an integer number (21218136).

Almost surely, 2^251270493 is an apocalyptic number.

It is an amenable number.

251270493 is a deficient number, since it is larger than the sum of its proper divisors (88219683).

251270493 is a wasteful number, since it uses less digits than its factorization.

251270493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3844.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 251270493 is about 15851.5139024637. The cubic root of 251270493 is about 631.0258695462.

The spelling of 251270493 in words is "two hundred fifty-one million, two hundred seventy thousand, four hundred ninety-three".