251345315552140 has 48 divisors (see below), whose sum is σ = 537828574725792. Its totient is φ = 98633027956736.

The previous prime is 251345315552081. The next prime is 251345315552143. The reversal of 251345315552140 is 41255513543152.

It is not an unprimeable number, because it can be changed into a prime (251345315552143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3040812 + ... + 22626028.

It is an arithmetic number, because the mean of its divisors is an integer number (11204761973454).

Almost surely, 2^{251345315552140} is an apocalyptic number.

251345315552140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251345315552140 is an abundant number, since it is smaller than the sum of its proper divisors (286483259173652).

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

251345315552140 is a wasteful number, since it uses less digits than its factorization.

251345315552140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19597386 (or 19597384 counting only the distinct ones).

The product of its (nonzero) digits is 1800000, while the sum is 46.

The spelling of 251345315552140 in words is "two hundred fifty-one trillion, three hundred forty-five billion, three hundred fifteen million, five hundred fifty-two thousand, one hundred forty".