51257860 has 24 divisors (see below), whose sum is σ = 107787456. Its totient is φ = 20475360.

The previous prime is 51257851. The next prime is 51257863. The reversal of 51257860 is 6875215.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (51257863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20055 + ... + 22465.

It is an arithmetic number, because the mean of its divisors is an integer number (4491144).

Almost surely, 2^51257860 is an apocalyptic number.

It is an amenable number.

51257860 is an abundant number, since it is smaller than the sum of its proper divisors (56529596).

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

51257860 is a wasteful number, since it uses less digits than its factorization.

51257860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483 (or 3481 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 51257860 is about 7159.4594768041. The cubic root of 51257860 is about 371.4669302452.

The spelling of 51257860 in words is "fifty-one million, two hundred fifty-seven thousand, eight hundred sixty".