51313630 has 8 divisors (see below), whose sum is σ = 92364552. Its totient is φ = 20525448.

The previous prime is 51313609. The next prime is 51313631. The reversal of 51313630 is 3631315.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51313631) 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, 2565672 + ... + 2565691.

It is an arithmetic number, because the mean of its divisors is an integer number (11545569).

Almost surely, 2^51313630 is an apocalyptic number.

51313630 is a deficient number, since it is larger than the sum of its proper divisors (41050922).

51313630 is a wasteful number, since it uses less digits than its factorization.

51313630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5131370.

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 51313630 is about 7163.3532650568. The cubic root of 51313630 is about 371.6016035863.

Adding to 51313630 its reverse (3631315), we get a palindrome (54944945).

The spelling of 51313630 in words is "fifty-one million, three hundred thirteen thousand, six hundred thirty".