51009822 has 24 divisors (see below), whose sum is σ = 113218560. Its totient is φ = 16588320.

The previous prime is 51009817. The next prime is 51009853. The reversal of 51009822 is 22890015.

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, 33822 + ... + 35297.

It is an arithmetic number, because the mean of its divisors is an integer number (4717440).

Almost surely, 2^51009822 is an apocalyptic number.

51009822 is an abundant number, since it is smaller than the sum of its proper divisors (62208738).

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

51009822 is a wasteful number, since it uses less digits than its factorization.

51009822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69168 (or 69165 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 51009822 is about 7142.1160729857. The cubic root of 51009822 is about 370.8667820633.

Adding to 51009822 its reverse (22890015), we get a palindrome (73899837).

The spelling of 51009822 in words is "fifty-one million, nine thousand, eight hundred twenty-two".