51402113 has 4 divisors (see below), whose sum is σ = 58745280. Its totient is φ = 44058948.

The previous prime is 51402041. The next prime is 51402187. The reversal of 51402113 is 31120415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51402113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51402091 and 51402100.

It is not an unprimeable number, because it can be changed into a prime (51402193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3671573 + ... + 3671586.

It is an arithmetic number, because the mean of its divisors is an integer number (14686320).

Almost surely, 2^51402113 is an apocalyptic number.

It is an amenable number.

51402113 is a deficient number, since it is larger than the sum of its proper divisors (7343167).

51402113 is an equidigital number, since it uses as much as digits as its factorization.

51402113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7343166.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 51402113 is about 7169.5266928857. The cubic root of 51402113 is about 371.8150721688.

Adding to 51402113 its reverse (31120415), we get a palindrome (82522528).

It can be divided in two parts, 51402 and 113, that added together give a palindrome (51515).

The spelling of 51402113 in words is "fifty-one million, four hundred two thousand, one hundred thirteen".