51403531234240 has 112 divisors (see below), whose sum is σ = 126591408691200. Its totient is φ = 19869201810432.

The previous prime is 51403531234183. The next prime is 51403531234277. The reversal of 51403531234240 is 4243213530415.

It is a self number, because there is not a number n which added to its sum of digits gives 51403531234240.

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, 20443410 + ... + 22819729.

Almost surely, 2^{51403531234240} is an apocalyptic number.

It is an amenable number.

51403531234240 is an abundant number, since it is smaller than the sum of its proper divisors (75187877456960).

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

51403531234240 is a wasteful number, since it uses less digits than its factorization.

51403531234240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43263282 (or 43263272 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 51403531234240 its reverse (4243213530415), we get a palindrome (55646744764655).

The spelling of 51403531234240 in words is "fifty-one trillion, four hundred three billion, five hundred thirty-one million, two hundred thirty-four thousand, two hundred forty".