51243956 has 12 divisors (see below), whose sum is σ = 90905892. Its totient is φ = 25270848.

The previous prime is 51243953. The next prime is 51243979. The reversal of 51243956 is 65934215.

It can be written as a sum of positive squares in 2 ways, for example, as 21715600 + 29528356 = 4660^2 + 5434^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51243953) 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, 87455 + ... + 88038.

It is an arithmetic number, because the mean of its divisors is an integer number (7575491).

Almost surely, 2^51243956 is an apocalyptic number.

It is an amenable number.

51243956 is a deficient number, since it is larger than the sum of its proper divisors (39661936).

51243956 is a wasteful number, since it uses less digits than its factorization.

51243956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175570 (or 175568 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

The square root of 51243956 is about 7158.4883879210. The cubic root of 51243956 is about 371.4333396683.

The spelling of 51243956 in words is "fifty-one million, two hundred forty-three thousand, nine hundred fifty-six".