51859480 has 32 divisors (see below), whose sum is σ = 121759200. Its totient is φ = 19841536.

The previous prime is 51859477. The next prime is 51859501. The reversal of 51859480 is 8495815.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27265 + ... + 29104.

It is an arithmetic number, because the mean of its divisors is an integer number (3804975).

Almost surely, 2^51859480 is an apocalyptic number.

It is an amenable number.

51859480 is an abundant number, since it is smaller than the sum of its proper divisors (69899720).

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

51859480 is a wasteful number, since it uses less digits than its factorization.

51859480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56403 (or 56399 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 51859480 is about 7201.3526507178. The cubic root of 51859480 is about 372.9145992555.

The spelling of 51859480 in words is "fifty-one million, eight hundred fifty-nine thousand, four hundred eighty".