51388922 has 16 divisors (see below), whose sum is σ = 83779080. Its totient is φ = 23499072.

The previous prime is 51388921. The next prime is 51388927. The reversal of 51388922 is 22988315.

It can be written as a sum of positive squares in 4 ways, for example, as 38204761 + 13184161 = 6181^2 + 3631^2 .

It is not an unprimeable number, because it can be changed into a prime (51388921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6233 + ... + 11900.

Almost surely, 2^51388922 is an apocalyptic number.

51388922 is a deficient number, since it is larger than the sum of its proper divisors (32390158).

51388922 is a wasteful number, since it uses less digits than its factorization.

51388922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18257.

The product of its digits is 34560, while the sum is 38.

The square root of 51388922 is about 7168.6066986549. The cubic root of 51388922 is about 371.7832639289.

The spelling of 51388922 in words is "fifty-one million, three hundred eighty-eight thousand, nine hundred twenty-two".