251345502340 has 48 divisors (see below), whose sum is σ = 538465838400. Its totient is φ = 98522237312.

The previous prime is 251345502301. The next prime is 251345502371. The reversal of 251345502340 is 43205543152.

It is a junction number, because it is equal to n+sod(n) for n = 251345502296 and 251345502305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38091 + ... + 710029.

It is an arithmetic number, because the mean of its divisors is an integer number (11218038300).

Almost surely, 2^251345502340 is an apocalyptic number.

251345502340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251345502340 is an abundant number, since it is smaller than the sum of its proper divisors (287120336060).

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

251345502340 is a wasteful number, since it uses less digits than its factorization.

251345502340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672324 (or 672322 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 34.

The spelling of 251345502340 in words is "two hundred fifty-one billion, three hundred forty-five million, five hundred two thousand, three hundred forty".