251126313340 has 24 divisors (see below), whose sum is σ = 602703152352. Its totient is φ = 86100450240.

The previous prime is 251126313289. The next prime is 251126313433. The reversal of 251126313340 is 43313621152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 896879551 + ... + 896879830.

It is an arithmetic number, because the mean of its divisors is an integer number (25112631348).

Almost surely, 2^251126313340 is an apocalyptic number.

251126313340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251126313340 is an abundant number, since it is smaller than the sum of its proper divisors (351576839012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251126313340 is a wasteful number, since it uses less digits than its factorization.

251126313340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793759397 (or 1793759395 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 251126313340 its reverse (43313621152), we get a palindrome (294439934492).

The spelling of 251126313340 in words is "two hundred fifty-one billion, one hundred twenty-six million, three hundred thirteen thousand, three hundred forty".