51630146 has 8 divisors (see below), whose sum is σ = 78315660. Its totient is φ = 25524928.

The previous prime is 51630091. The next prime is 51630149. The reversal of 51630146 is 64103615.

It can be written as a sum of positive squares in 2 ways, for example, as 51051025 + 579121 = 7145^2 + 761^2 .

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

It is not an unprimeable number, because it can be changed into a prime (51630149) 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, 144851 + ... + 145206.

Almost surely, 2^51630146 is an apocalyptic number.

51630146 is a deficient number, since it is larger than the sum of its proper divisors (26685514).

51630146 is a wasteful number, since it uses less digits than its factorization.

51630146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290148.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 51630146 is about 7185.4120271561. The cubic root of 51630146 is about 372.3640835605.

The spelling of 51630146 in words is "fifty-one million, six hundred thirty thousand, one hundred forty-six".