51321822 has 16 divisors (see below), whose sum is σ = 106183440. Its totient is φ = 16517312.

The previous prime is 51321817. The next prime is 51321839. The reversal of 51321822 is 22812315.

It is a junction number, because it is equal to n+sod(n) for n = 51321792 and 51321801.

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, 147303 + ... + 147650.

It is an arithmetic number, because the mean of its divisors is an integer number (6636465).

Almost surely, 2^51321822 is an apocalyptic number.

51321822 is an abundant number, since it is smaller than the sum of its proper divisors (54861618).

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

51321822 is a wasteful number, since it uses less digits than its factorization.

51321822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294987.

The product of its digits is 960, while the sum is 24.

The square root of 51321822 is about 7163.9250414839. The cubic root of 51321822 is about 371.6213773992.

The spelling of 51321822 in words is "fifty-one million, three hundred twenty-one thousand, eight hundred twenty-two".