51810680 has 32 divisors (see below), whose sum is σ = 118778400. Its totient is φ = 20332416.

The previous prime is 51810653. The next prime is 51810683. The reversal of 51810680 is 8601815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51810683) 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, 10100 + ... + 14339.

It is an arithmetic number, because the mean of its divisors is an integer number (3711825).

Almost surely, 2^51810680 is an apocalyptic number.

It is an amenable number.

51810680 is an abundant number, since it is smaller than the sum of its proper divisors (66967720).

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

51810680 is a wasteful number, since it uses less digits than its factorization.

51810680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24503 (or 24499 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 51810680 is about 7197.9636009082. The cubic root of 51810680 is about 372.7975911171.

The spelling of 51810680 in words is "fifty-one million, eight hundred ten thousand, six hundred eighty".