51286388 has 12 divisors (see below), whose sum is σ = 90041952. Its totient is φ = 25560120.

The previous prime is 51286387. The next prime is 51286393. The reversal of 51286388 is 88368215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51286387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19370 + ... + 21857.

It is an arithmetic number, because the mean of its divisors is an integer number (7503496).

Almost surely, 2^51286388 is an apocalyptic number.

It is an amenable number.

51286388 is a deficient number, since it is larger than the sum of its proper divisors (38755564).

51286388 is a wasteful number, since it uses less digits than its factorization.

51286388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41542 (or 41540 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The square root of 51286388 is about 7161.4515288453. The cubic root of 51286388 is about 371.5358318290.

The spelling of 51286388 in words is "fifty-one million, two hundred eighty-six thousand, three hundred eighty-eight".