51996906 has 36 divisors (see below), whose sum is σ = 121999878. Its totient is φ = 15998112.

The previous prime is 51996881. The next prime is 51996907. The reversal of 51996906 is 60969915.

51996906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 27405225 + 24591681 = 5235^2 + 4959^2 .

It is not an unprimeable number, because it can be changed into a prime (51996907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5505 + ... + 11588.

Almost surely, 2^51996906 is an apocalyptic number.

51996906 is an abundant number, since it is smaller than the sum of its proper divisors (70002972).

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

51996906 is a wasteful number, since it uses less digits than its factorization.

51996906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17127 (or 17111 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 51996906 is about 7210.8880174359. Note that the first 3 decimals coincide. The cubic root of 51996906 is about 373.2437127211.

The spelling of 51996906 in words is "fifty-one million, nine hundred ninety-six thousand, nine hundred six".