51630741 has 12 divisors (see below), whose sum is σ = 74817132. Its totient is φ = 34310016.

The previous prime is 51630737. The next prime is 51630743. The reversal of 51630741 is 14703615.

51630741 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 4639716 + 46991025 = 2154^2 + 6855^2 .

It is not a de Polignac number, because 51630741 - 2² = 51630737 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51630743) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6196 + ... + 11901.

It is an arithmetic number, because the mean of its divisors is an integer number (6234761).

Almost surely, 2^51630741 is an apocalyptic number.

It is an amenable number.

51630741 is a deficient number, since it is larger than the sum of its proper divisors (23186391).

51630741 is a wasteful number, since it uses less digits than its factorization.

51630741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18420 (or 18417 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 51630741 is about 7185.4534303689. The cubic root of 51630741 is about 372.3655139637.

The spelling of 51630741 in words is "fifty-one million, six hundred thirty thousand, seven hundred forty-one".