251040453243140 has 48 divisors (see below), whose sum is σ = 575804597417280. Its totient is φ = 91177319940480.

The previous prime is 251040453243121. The next prime is 251040453243157. The reversal of 251040453243140 is 41342354040152.

It is a junction number, because it is equal to n+sod(n) for n = 251040453243094 and 251040453243103.

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, 688052222 + ... + 688416981.

It is an arithmetic number, because the mean of its divisors is an integer number (11995929112860).

Almost surely, 2^{251040453243140} is an apocalyptic number.

251040453243140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251040453243140 is an abundant number, since it is smaller than the sum of its proper divisors (324764144174140).

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

251040453243140 is a wasteful number, since it uses less digits than its factorization.

251040453243140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376470052 (or 1376470050 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 38.

The spelling of 251040453243140 in words is "two hundred fifty-one trillion, forty billion, four hundred fifty-three million, two hundred forty-three thousand, one hundred forty".