51245313 has 8 divisors (see below), whose sum is σ = 78088128. Its totient is φ = 29283024.

The previous prime is 51245309. The next prime is 51245317. The reversal of 51245313 is 31354215.

It is an interprime number because it is at equal distance from previous prime (51245309) and next prime (51245317).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51245313 - 2² = 51245309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51245317) 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 7 ways as a sum of consecutive naturals, for example, 1220106 + ... + 1220147.

It is an arithmetic number, because the mean of its divisors is an integer number (9761016).

Almost surely, 2^51245313 is an apocalyptic number.

It is an amenable number.

51245313 is a deficient number, since it is larger than the sum of its proper divisors (26842815).

51245313 is a wasteful number, since it uses less digits than its factorization.

51245313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440263.

The product of its digits is 1800, while the sum is 24.

The square root of 51245313 is about 7158.5831698738. The cubic root of 51245313 is about 371.4366183027.

Adding to 51245313 its reverse (31354215), we get a palindrome (82599528).

The spelling of 51245313 in words is "fifty-one million, two hundred forty-five thousand, three hundred thirteen".