51899040 has 144 divisors (see below), whose sum is σ = 184923648. Its totient is φ = 13229568.

The previous prime is 51899039. The next prime is 51899069. The reversal of 51899040 is 4099815.

51899040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51898986 and 51899004.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 32337 + ... + 33903.

It is an arithmetic number, because the mean of its divisors is an integer number (1284192).

Almost surely, 2^51899040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51899040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92461824).

51899040 is an abundant number, since it is smaller than the sum of its proper divisors (133024608).

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

51899040 is a wasteful number, since it uses less digits than its factorization.

51899040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611 (or 1600 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 51899040 is about 7204.0988333032. The cubic root of 51899040 is about 373.0093987143.

The spelling of 51899040 in words is "fifty-one million, eight hundred ninety-nine thousand, forty".