51630629 has 4 divisors (see below), whose sum is σ = 51667200. Its totient is φ = 51594060.

The previous prime is 51630613. The next prime is 51630641. The reversal of 51630629 is 92603615.

It is a happy number.

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 51630629 - 2⁴ = 51630613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51630595 and 51630604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51630679) 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, 16079 + ... + 19020.

It is an arithmetic number, because the mean of its divisors is an integer number (12916800).

Almost surely, 2^51630629 is an apocalyptic number.

It is an amenable number.

51630629 is a deficient number, since it is larger than the sum of its proper divisors (36571).

51630629 is a wasteful number, since it uses less digits than its factorization.

51630629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36570.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 51630629 is about 7185.4456368412. The cubic root of 51630629 is about 372.3652447122.

The spelling of 51630629 in words is "fifty-one million, six hundred thirty thousand, six hundred twenty-nine".