51870222 has 24 divisors (see below), whose sum is σ = 112633560. Its totient is φ = 17251920.

The previous prime is 51870197. The next prime is 51870233. The reversal of 51870222 is 22207815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5904 + ... + 11772.

It is an arithmetic number, because the mean of its divisors is an integer number (4693065).

Almost surely, 2^51870222 is an apocalyptic number.

51870222 is an abundant number, since it is smaller than the sum of its proper divisors (60763338).

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

51870222 is a wasteful number, since it uses less digits than its factorization.

51870222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6368 (or 6365 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 51870222 is about 7202.0984442036. The cubic root of 51870222 is about 372.9403455740.

The spelling of 51870222 in words is "fifty-one million, eight hundred seventy thousand, two hundred twenty-two".