51145533 has 16 divisors (see below), whose sum is σ = 77535040. Its totient is φ = 33303312.

The previous prime is 51145519. The next prime is 51145553. The reversal of 51145533 is 33554115.

It is not a de Polignac number, because 51145533 - 2⁹ = 51145021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51145497 and 51145506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20866 + ... + 23187.

It is an arithmetic number, because the mean of its divisors is an integer number (4845940).

Almost surely, 2^51145533 is an apocalyptic number.

It is an amenable number.

51145533 is a deficient number, since it is larger than the sum of its proper divisors (26389507).

51145533 is a wasteful number, since it uses less digits than its factorization.

51145533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44105 (or 44099 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 51145533 is about 7151.6105179183. The cubic root of 51145533 is about 371.1953863138.

Adding to 51145533 its reverse (33554115), we get a palindrome (84699648).

The spelling of 51145533 in words is "fifty-one million, one hundred forty-five thousand, five hundred thirty-three".