51801133 has 8 divisors (see below), whose sum is σ = 52263936. Its totient is φ = 51340800.

The previous prime is 51801131. The next prime is 51801137. The reversal of 51801133 is 33110815.

51801133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51801133 - 2¹ = 51801131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51801131) 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, 80493 + ... + 81133.

It is an arithmetic number, because the mean of its divisors is an integer number (6532992).

Almost surely, 2^51801133 is an apocalyptic number.

It is an amenable number.

51801133 is a deficient number, since it is larger than the sum of its proper divisors (462803).

51801133 is a wasteful number, since it uses less digits than its factorization.

51801133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 51801133 is about 7197.3003966765. The cubic root of 51801133 is about 372.7746916091.

Adding to 51801133 its reverse (33110815), we get a palindrome (84911948).

The spelling of 51801133 in words is "fifty-one million, eight hundred one thousand, one hundred thirty-three".