51499860 has 48 divisors (see below), whose sum is σ = 146573952. Its totient is φ = 13507200.

The previous prime is 51499859. The next prime is 51499883. The reversal of 51499860 is 6899415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3376 + ... + 10695.

It is an arithmetic number, because the mean of its divisors is an integer number (3053624).

Almost surely, 2^51499860 is an apocalyptic number.

It is an amenable number.

51499860 is an abundant number, since it is smaller than the sum of its proper divisors (95074092).

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

51499860 is a wasteful number, since it uses less digits than its factorization.

51499860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14144 (or 14142 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 51499860 is about 7176.3402929348. The cubic root of 51499860 is about 372.0506059030.

The spelling of 51499860 in words is "fifty-one million, four hundred ninety-nine thousand, eight hundred sixty".