251115103140240 has 40 divisors (see below), whose sum is σ = 778456819735488. Its totient is φ = 66964027504000.

The previous prime is 251115103140233. The next prime is 251115103140269. The reversal of 251115103140240 is 42041301511152.

It is a tau number, because it is divible by the number of its divisors (40).

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 = 251115103140198 and 251115103140207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523156464636 + ... + 523156465115.

Almost surely, 2^{251115103140240} is an apocalyptic number.

251115103140240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251115103140240 is an abundant number, since it is smaller than the sum of its proper divisors (527341716595248).

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

251115103140240 is a wasteful number, since it uses less digits than its factorization.

251115103140240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046312929767 (or 1046312929761 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 251115103140240 its reverse (42041301511152), we get a palindrome (293156404651392).

The spelling of 251115103140240 in words is "two hundred fifty-one trillion, one hundred fifteen billion, one hundred three million, one hundred forty thousand, two hundred forty".