51311135403 has 24 divisors (see below), whose sum is σ = 80875796976. Its totient is φ = 31089240000.

The previous prime is 51311135357. The next prime is 51311135431. The reversal of 51311135403 is 30453111315.

It is a happy number.

51311135403 is a `hidden beast` number, since 5 + 1 + 3 + 1 + 113 + 540 + 3 = 666.

It is not a de Polignac number, because 51311135403 - 2¹³ = 51311127211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51311135453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 307653 + ... + 444153.

It is an arithmetic number, because the mean of its divisors is an integer number (3369824874).

Almost surely, 2^51311135403 is an apocalyptic number.

51311135403 is a deficient number, since it is larger than the sum of its proper divisors (29564661573).

51311135403 is a wasteful number, since it uses less digits than its factorization.

51311135403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140315 (or 140312 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

Adding to 51311135403 its reverse (30453111315), we get a palindrome (81764246718).

The spelling of 51311135403 in words is "fifty-one billion, three hundred eleven million, one hundred thirty-five thousand, four hundred three".