51243634 has 16 divisors (see below), whose sum is σ = 83243160. Its totient is φ = 23518080.

The previous prime is 51243629. The next prime is 51243641. The reversal of 51243634 is 43634215.

It can be written as a sum of positive squares in 4 ways, for example, as 5640625 + 45603009 = 2375^2 + 6753^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739 + ... + 10150.

Almost surely, 2^51243634 is an apocalyptic number.

51243634 is a deficient number, since it is larger than the sum of its proper divisors (31999526).

51243634 is a wasteful number, since it uses less digits than its factorization.

51243634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11085.

The product of its digits is 8640, while the sum is 28.

The square root of 51243634 is about 7158.4658971039. The cubic root of 51243634 is about 371.4325616787.

Adding to 51243634 its reverse (43634215), we get a palindrome (94877849).

The spelling of 51243634 in words is "fifty-one million, two hundred forty-three thousand, six hundred thirty-four".