51530313505 has 16 divisors (see below), whose sum is σ = 68088320064. Its totient is φ = 37126338880.

The previous prime is 51530313493. The next prime is 51530313529. The reversal of 51530313505 is 50531303515.

It is a happy number.

51530313505 is digitally balanced in base 11, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51530313505 - 2²³ = 51521924897 is a prime.

It is a Duffinian number.

51530313505 is strictly pandigital in base 11.

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, 4372222 + ... + 4383991.

It is an arithmetic number, because the mean of its divisors is an integer number (4255520004).

Almost surely, 2^51530313505 is an apocalyptic number.

51530313505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51530313505 is a deficient number, since it is larger than the sum of its proper divisors (16558006559).

51530313505 is a wasteful number, since it uses less digits than its factorization.

51530313505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8756336.

The product of its (nonzero) digits is 16875, while the sum is 31.

The spelling of 51530313505 in words is "fifty-one billion, five hundred thirty million, three hundred thirteen thousand, five hundred five".