51322380 has 24 divisors (see below), whose sum is σ = 143702832. Its totient is φ = 13685952.

The previous prime is 51322379. The next prime is 51322387. The reversal of 51322380 is 8322315.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 51322380.

It is not an unprimeable number, because it can be changed into a prime (51322387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427627 + ... + 427746.

It is an arithmetic number, because the mean of its divisors is an integer number (5987618).

Almost surely, 2^51322380 is an apocalyptic number.

It is an amenable number.

51322380 is an abundant number, since it is smaller than the sum of its proper divisors (92380452).

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

51322380 is a wasteful number, since it uses less digits than its factorization.

51322380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855385 (or 855383 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 51322380 is about 7163.9639865091. The cubic root of 51322380 is about 371.6227242205.

Adding to 51322380 its reverse (8322315), we get a palindrome (59644695).

The spelling of 51322380 in words is "fifty-one million, three hundred twenty-two thousand, three hundred eighty".