51345533 has 2 divisors, whose sum is σ = 51345534. Its totient is φ = 51345532.

The previous prime is 51345521. The next prime is 51345563. The reversal of 51345533 is 33554315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49815364 + 1530169 = 7058^2 + 1237^2 .

It is a cyclic number.

It is not a de Polignac number, because 51345533 - 2²⁰ = 50296957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51345496 and 51345505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51345563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25672766 + 25672767.

It is an arithmetic number, because the mean of its divisors is an integer number (25672767).

Almost surely, 2^51345533 is an apocalyptic number.

It is an amenable number.

51345533 is a deficient number, since it is larger than the sum of its proper divisors (1).

51345533 is an equidigital number, since it uses as much as digits as its factorization.

51345533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 29.

The square root of 51345533 is about 7165.5797392814. The cubic root of 51345533 is about 371.6785990480.

Adding to 51345533 its reverse (33554315), we get a palindrome (84899848).

The spelling of 51345533 in words is "fifty-one million, three hundred forty-five thousand, five hundred thirty-three".