251035001340 has 48 divisors (see below), whose sum is σ = 702928588320. Its totient is φ = 66939754240.

The previous prime is 251035001323. The next prime is 251035001407. The reversal of 251035001340 is 43100530152.

It is a self number, because there is not a number n which added to its sum of digits gives 251035001340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1541326 + ... + 1696394.

It is an arithmetic number, because the mean of its divisors is an integer number (14644345590).

Almost surely, 2^251035001340 is an apocalyptic number.

251035001340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251035001340 is an abundant number, since it is smaller than the sum of its proper divisors (451893586980).

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

251035001340 is a wasteful number, since it uses less digits than its factorization.

251035001340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182062 (or 182060 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 251035001340 its reverse (43100530152), we get a palindrome (294135531492).

The spelling of 251035001340 in words is "two hundred fifty-one billion, thirty-five million, one thousand, three hundred forty".