51881822 has 16 divisors (see below), whose sum is σ = 79904880. Its totient is φ = 25251072.

The previous prime is 51881801. The next prime is 51881833. The reversal of 51881822 is 22818815.

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, 29504 + ... + 31212.

It is an arithmetic number, because the mean of its divisors is an integer number (4994055).

Almost surely, 2^51881822 is an apocalyptic number.

51881822 is a deficient number, since it is larger than the sum of its proper divisors (28023058).

51881822 is a wasteful number, since it uses less digits than its factorization.

51881822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107.

The product of its digits is 10240, while the sum is 35.

The square root of 51881822 is about 7202.9037200285. The cubic root of 51881822 is about 372.9681443468.

The spelling of 51881822 in words is "fifty-one million, eight hundred eighty-one thousand, eight hundred twenty-two".