51245533 has 2 divisors, whose sum is σ = 51245534. Its totient is φ = 51245532.

The previous prime is 51245521. The next prime is 51245539. The reversal of 51245533 is 33554215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48818169 + 2427364 = 6987^2 + 1558^2 .

It is a cyclic number.

It is not a de Polignac number, because 51245533 - 2⁵ = 51245501 is a prime.

It is a super-2 number, since 2×51245533² = 5252209304908178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51245539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25622766 + 25622767.

It is an arithmetic number, because the mean of its divisors is an integer number (25622767).

Almost surely, 2^51245533 is an apocalyptic number.

It is an amenable number.

51245533 is a deficient number, since it is larger than the sum of its proper divisors (1).

51245533 is an equidigital number, since it uses as much as digits as its factorization.

51245533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 28.

The square root of 51245533 is about 7158.5985360264. The cubic root of 51245533 is about 371.4371498371.

Adding to 51245533 its reverse (33554215), we get a palindrome (84799748).

The spelling of 51245533 in words is "fifty-one million, two hundred forty-five thousand, five hundred thirty-three".