251053293 has 4 divisors (see below), whose sum is σ = 334737728. Its totient is φ = 167368860.

The previous prime is 251053249. The next prime is 251053357. The reversal of 251053293 is 392350152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 251053293 - 2⁸ = 251053037 is a prime.

It is a super-2 number, since 2×251053293² = 126055511852287698, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 251053293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251053193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41842213 + ... + 41842218.

It is an arithmetic number, because the mean of its divisors is an integer number (83684432).

Almost surely, 2^251053293 is an apocalyptic number.

It is an amenable number.

251053293 is a deficient number, since it is larger than the sum of its proper divisors (83684435).

251053293 is an equidigital number, since it uses as much as digits as its factorization.

251053293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83684434.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 251053293 is about 15844.6613406535. The cubic root of 251053293 is about 630.8439960497.

The spelling of 251053293 in words is "two hundred fifty-one million, fifty-three thousand, two hundred ninety-three".