51226533 has 8 divisors (see below), whose sum is σ = 75891200. Its totient is φ = 34151004.

The previous prime is 51226529. The next prime is 51226561. The reversal of 51226533 is 33562215.

51226533 is a `hidden beast` number, since 5 + 1 + 2 + 2 + 653 + 3 = 666.

It is not a de Polignac number, because 51226533 - 2² = 51226529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1897279 = 51226533 / (5 + 1 + 2 + 2 + 6 + 5 + 3 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51226497 and 51226506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51226333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948613 + ... + 948666.

It is an arithmetic number, because the mean of its divisors is an integer number (9486400).

Almost surely, 2^51226533 is an apocalyptic number.

It is an amenable number.

51226533 is a deficient number, since it is larger than the sum of its proper divisors (24664667).

51226533 is a wasteful number, since it uses less digits than its factorization.

51226533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897288 (or 1897282 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 51226533 is about 7157.2713375979. The cubic root of 51226533 is about 371.3912389852.

Adding to 51226533 its reverse (33562215), we get a palindrome (84788748).

The spelling of 51226533 in words is "fifty-one million, two hundred twenty-six thousand, five hundred thirty-three".