51761533 has 2 divisors, whose sum is σ = 51761534. Its totient is φ = 51761532.

The previous prime is 51761531. The next prime is 51761543. The reversal of 51761533 is 33516715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50168889 + 1592644 = 7083^2 + 1262^2 .

It is a cyclic number.

It is not a de Polignac number, because 51761533 - 2¹ = 51761531 is a prime.

Together with 51761531, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 51761495 and 51761504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51761531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25880766 + 25880767.

It is an arithmetic number, because the mean of its divisors is an integer number (25880767).

Almost surely, 2^51761533 is an apocalyptic number.

It is an amenable number.

51761533 is a deficient number, since it is larger than the sum of its proper divisors (1).

51761533 is an equidigital number, since it uses as much as digits as its factorization.

51761533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9450, while the sum is 31.

The square root of 51761533 is about 7194.5488392254. The cubic root of 51761533 is about 372.6796766924.

The spelling of 51761533 in words is "fifty-one million, seven hundred sixty-one thousand, five hundred thirty-three".