51113630 has 16 divisors (see below), whose sum is σ = 93378960. Its totient is φ = 20140032.

The previous prime is 51113609. The next prime is 51113633. The reversal of 51113630 is 3631115.

It is a happy number.

It is a super-2 number, since 2×51113630² = 5225206343553800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51113633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37475 + ... + 38814.

It is an arithmetic number, because the mean of its divisors is an integer number (5836185).

Almost surely, 2^51113630 is an apocalyptic number.

51113630 is a deficient number, since it is larger than the sum of its proper divisors (42265330).

51113630 is a wasteful number, since it uses less digits than its factorization.

51113630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76363.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 51113630 is about 7149.3796933720. The cubic root of 51113630 is about 371.1181901975.

Adding to 51113630 its reverse (3631115), we get a palindrome (54744745).

It can be divided in two parts, 511 and 13630, that added together give a palindrome (14141).

The spelling of 51113630 in words is "fifty-one million, one hundred thirteen thousand, six hundred thirty".