51257812 has 24 divisors (see below), whose sum is σ = 92306592. Its totient is φ = 24895200.

The previous prime is 51257797. The next prime is 51257813. The reversal of 51257812 is 21875215.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51257813) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18987 + ... + 21517.

It is an arithmetic number, because the mean of its divisors is an integer number (3846108).

Almost surely, 2^51257812 is an apocalyptic number.

It is an amenable number.

51257812 is a deficient number, since it is larger than the sum of its proper divisors (41048780).

51257812 is a wasteful number, since it uses less digits than its factorization.

51257812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679 (or 2677 counting only the distinct ones).

The product of its digits is 5600, while the sum is 31.

The square root of 51257812 is about 7159.4561245949. The cubic root of 51257812 is about 371.4668142928.

The spelling of 51257812 in words is "fifty-one million, two hundred fifty-seven thousand, eight hundred twelve".