251342341140 has 48 divisors (see below), whose sum is σ = 767736607680. Its totient is φ = 60931476480.

The previous prime is 251342341121. The next prime is 251342341177. The reversal of 251342341140 is 41143243152.

It is a super-2 number, since 2×251342341140² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 251342341098 and 251342341107.

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, 190410205 + ... + 190411524.

It is an arithmetic number, because the mean of its divisors is an integer number (15994512660).

Almost surely, 2^251342341140 is an apocalyptic number.

251342341140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251342341140 is an abundant number, since it is smaller than the sum of its proper divisors (516394266540).

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

251342341140 is a wasteful number, since it uses less digits than its factorization.

251342341140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380821752 (or 380821750 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 251342341140 its reverse (41143243152), we get a palindrome (292485584292).

The spelling of 251342341140 in words is "two hundred fifty-one billion, three hundred forty-two million, three hundred forty-one thousand, one hundred forty".