51630946 has 8 divisors (see below), whose sum is σ = 77617260. Its totient is φ = 25758528.

The previous prime is 51630919. The next prime is 51630979. The reversal of 51630946 is 64903615.

51630946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 51194025 + 436921 = 7155^2 + 661^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27331 + ... + 29158.

Almost surely, 2^51630946 is an apocalyptic number.

51630946 is a deficient number, since it is larger than the sum of its proper divisors (25986314).

51630946 is a wasteful number, since it uses less digits than its factorization.

51630946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56948.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 51630946 is about 7185.4676952861. The cubic root of 51630946 is about 372.3660067891.

The spelling of 51630946 in words is "fifty-one million, six hundred thirty thousand, nine hundred forty-six".