51368420 has 24 divisors (see below), whose sum is σ = 108114048. Its totient is φ = 20501600.

The previous prime is 51368417. The next prime is 51368479. The reversal of 51368420 is 2486315.

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, 7205 + ... + 12435.

It is an arithmetic number, because the mean of its divisors is an integer number (4504752).

Almost surely, 2^51368420 is an apocalyptic number.

It is an amenable number.

51368420 is an abundant number, since it is smaller than the sum of its proper divisors (56745628).

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

51368420 is a wasteful number, since it uses less digits than its factorization.

51368420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731 (or 5729 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 51368420 is about 7167.1765710076. The cubic root of 51368420 is about 371.7338154352.

The spelling of 51368420 in words is "fifty-one million, three hundred sixty-eight thousand, four hundred twenty".