51335890 has 16 divisors (see below), whose sum is σ = 92738520. Its totient is φ = 20460160.

The previous prime is 51335873. The next prime is 51335899. The reversal of 51335890 is 9853315.

51335890 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 4 ways, for example, as 47983329 + 3352561 = 6927^2 + 1831^2 .

It is not an unprimeable number, because it can be changed into a prime (51335899) 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 7 ways as a sum of consecutive naturals, for example, 6325 + ... + 11944.

Almost surely, 2^51335890 is an apocalyptic number.

51335890 is a deficient number, since it is larger than the sum of its proper divisors (41402630).

51335890 is a wasteful number, since it uses less digits than its factorization.

51335890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18557.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 51335890 is about 7164.9068381941. The cubic root of 51335890 is about 371.6553297656.

It can be divided in two parts, 51335 and 890, that added together give a palindrome (52225).

The spelling of 51335890 in words is "fifty-one million, three hundred thirty-five thousand, eight hundred ninety".