51115630 has 8 divisors (see below), whose sum is σ = 92008152. Its totient is φ = 20446248.

The previous prime is 51115613. The next prime is 51115657. The reversal of 51115630 is 3651115.

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

It is a super-2 number, since 2×51115630² = 5225615260593800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2555772 + ... + 2555791.

It is an arithmetic number, because the mean of its divisors is an integer number (11501019).

Almost surely, 2^51115630 is an apocalyptic number.

51115630 is a deficient number, since it is larger than the sum of its proper divisors (40892522).

51115630 is a wasteful number, since it uses less digits than its factorization.

51115630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5111570.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 51115630 is about 7149.5195642784. The cubic root of 51115630 is about 371.1230305679.

Adding to 51115630 its reverse (3651115), we get a palindrome (54766745).

The spelling of 51115630 in words is "fifty-one million, one hundred fifteen thousand, six hundred thirty".