51013331 has 4 divisors (see below), whose sum is σ = 51774792. Its totient is φ = 50251872.

The previous prime is 51013301. The next prime is 51013357. The reversal of 51013331 is 13331015.

51013331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51013331 is a prime.

It is a super-2 number, since 2×51013331² = 5204719879431122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51013301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380630 + ... + 380763.

It is an arithmetic number, because the mean of its divisors is an integer number (12943698).

Almost surely, 2^51013331 is an apocalyptic number.

51013331 is a deficient number, since it is larger than the sum of its proper divisors (761461).

51013331 is an equidigital number, since it uses as much as digits as its factorization.

51013331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761460.

The product of its (nonzero) digits is 135, while the sum is 17.

The square root of 51013331 is about 7142.3617242478. The cubic root of 51013331 is about 370.8752859269.

Adding to 51013331 its reverse (13331015), we get a palindrome (64344346).

The spelling of 51013331 in words is "fifty-one million, thirteen thousand, three hundred thirty-one".