51242512 has 20 divisors (see below), whose sum is σ = 99396540. Its totient is φ = 25591808.

The previous prime is 51242491. The next prime is 51242533. The reversal of 51242512 is 21524215.

It is an interprime number because it is at equal distance from previous prime (51242491) and next prime (51242533).

It can be written as a sum of positive squares in 2 ways, for example, as 19927296 + 31315216 = 4464^2 + 5596^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21408 + ... + 23680.

It is an arithmetic number, because the mean of its divisors is an integer number (4969827).

Almost surely, 2^51242512 is an apocalyptic number.

It is an amenable number.

51242512 is a deficient number, since it is larger than the sum of its proper divisors (48154028).

51242512 is a wasteful number, since it uses less digits than its factorization.

51242512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3690 (or 3684 counting only the distinct ones).

The product of its digits is 800, while the sum is 22.

The square root of 51242512 is about 7158.3875279283. The cubic root of 51242512 is about 371.4298507705.

Adding to 51242512 its reverse (21524215), we get a palindrome (72766727).

The spelling of 51242512 in words is "fifty-one million, two hundred forty-two thousand, five hundred twelve".