51229900 has 36 divisors (see below), whose sum is σ = 111508488. Its totient is φ = 20429440.

The previous prime is 51229883. The next prime is 51229903. The reversal of 51229900 is 992215.

51229900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51229903) 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 11 ways as a sum of consecutive naturals, for example, 46152 + ... + 47248.

It is an arithmetic number, because the mean of its divisors is an integer number (3097458).

Almost surely, 2^51229900 is an apocalyptic number.

51229900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51229900 is an abundant number, since it is smaller than the sum of its proper divisors (60278588).

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

51229900 is a wasteful number, since it uses less digits than its factorization.

51229900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 1571 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 51229900 is about 7157.5065490714. The cubic root of 51229900 is about 371.3993756990.

The spelling of 51229900 in words is "fifty-one million, two hundred twenty-nine thousand, nine hundred".