51051313 has 4 divisors (see below), whose sum is σ = 51072880. Its totient is φ = 51029748.

The previous prime is 51051311. The next prime is 51051317. The reversal of 51051313 is 31315015.

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 51051313 - 2¹ = 51051311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51051311) 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, 6723 + ... + 12136.

It is an arithmetic number, because the mean of its divisors is an integer number (12768220).

Almost surely, 2^51051313 is an apocalyptic number.

It is an amenable number.

51051313 is a deficient number, since it is larger than the sum of its proper divisors (21567).

51051313 is a wasteful number, since it uses less digits than its factorization.

51051313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21566.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 51051313 is about 7145.0201539254. The cubic root of 51051313 is about 370.9673082161.

Adding to 51051313 its reverse (31315015), we get a palindrome (82366328).

The spelling of 51051313 in words is "fifty-one million, fifty-one thousand, three hundred thirteen".