51423133 has 4 divisors (see below), whose sum is σ = 51815808. Its totient is φ = 51030460.

The previous prime is 51423109. The next prime is 51423157. The reversal of 51423133 is 33132415.

51423133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (51423109) and next prime (51423157).

It is a cyclic number.

It is not a de Polignac number, because 51423133 - 2¹⁷ = 51292061 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 (51423433) 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 3 ways as a sum of consecutive naturals, for example, 196141 + ... + 196402.

It is an arithmetic number, because the mean of its divisors is an integer number (12953952).

Almost surely, 2^51423133 is an apocalyptic number.

It is an amenable number.

51423133 is a deficient number, since it is larger than the sum of its proper divisors (392675).

51423133 is a wasteful number, since it uses less digits than its factorization.

51423133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392674.

The product of its digits is 1080, while the sum is 22.

The square root of 51423133 is about 7170.9924696655. The cubic root of 51423133 is about 371.8657476972.

Adding to 51423133 its reverse (33132415), we get a palindrome (84555548).

The spelling of 51423133 in words is "fifty-one million, four hundred twenty-three thousand, one hundred thirty-three".