51630345 has 96 divisors (see below), whose sum is σ = 104002560. Its totient is φ = 24261120.

The previous prime is 51630329. The next prime is 51630347. The reversal of 51630345 is 54303615.

It is not a de Polignac number, because 51630345 - 2⁴ = 51630329 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51630347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 707229 + ... + 707301.

It is an arithmetic number, because the mean of its divisors is an integer number (1083360).

Almost surely, 2^51630345 is an apocalyptic number.

It is an amenable number.

51630345 is an abundant number, since it is smaller than the sum of its proper divisors (52372215).

51630345 is a wasteful number, since it uses less digits than its factorization.

51630345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 51630345 is about 7185.4258746438. The cubic root of 51630345 is about 372.3645619655.

The spelling of 51630345 in words is "fifty-one million, six hundred thirty thousand, three hundred forty-five".