51315349 has 4 divisors (see below), whose sum is σ = 51438240. Its totient is φ = 51192460.

The previous prime is 51315317. The next prime is 51315359. The reversal of 51315349 is 94351315.

It is a happy number.

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 not a de Polignac number, because 51315349 - 2⁵ = 51315317 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51315349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51315359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60817 + ... + 61654.

It is an arithmetic number, because the mean of its divisors is an integer number (12859560).

Almost surely, 2^51315349 is an apocalyptic number.

It is an amenable number.

51315349 is a deficient number, since it is larger than the sum of its proper divisors (122891).

51315349 is a wasteful number, since it uses less digits than its factorization.

51315349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122890.

The product of its digits is 8100, while the sum is 31.

The square root of 51315349 is about 7163.4732497581. The cubic root of 51315349 is about 371.6057530752.

The spelling of 51315349 in words is "fifty-one million, three hundred fifteen thousand, three hundred forty-nine".