51243654 has 32 divisors (see below), whose sum is σ = 127777536. Its totient is φ = 13309920.

The previous prime is 51243641. The next prime is 51243679. The reversal of 51243654 is 45634215.

51243654 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 54997 + ... + 55920.

It is an arithmetic number, because the mean of its divisors is an integer number (3993048).

Almost surely, 2^51243654 is an apocalyptic number.

51243654 is an abundant number, since it is smaller than the sum of its proper divisors (76533882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51243654 is a wasteful number, since it uses less digits than its factorization.

51243654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110940.

The product of its digits is 14400, while the sum is 30.

The square root of 51243654 is about 7158.4672940512. The cubic root of 51243654 is about 371.4326100012.

Adding to 51243654 its reverse (45634215), we get a palindrome (96877869).

It can be divided in two parts, 5124 and 3654, that added together give a palindrome (8778).

The spelling of 51243654 in words is "fifty-one million, two hundred forty-three thousand, six hundred fifty-four".