51533549 has 2 divisors, whose sum is σ = 51533550. Its totient is φ = 51533548.

The previous prime is 51533539. The next prime is 51533557. The reversal of 51533549 is 94533515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42016324 + 9517225 = 6482^2 + 3085^2 .

It is a cyclic number.

It is not a de Polignac number, because 51533549 - 2¹⁶ = 51468013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51533539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25766774 + 25766775.

It is an arithmetic number, because the mean of its divisors is an integer number (25766775).

Almost surely, 2^51533549 is an apocalyptic number.

It is an amenable number.

51533549 is a deficient number, since it is larger than the sum of its proper divisors (1).

51533549 is an equidigital number, since it uses as much as digits as its factorization.

51533549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40500, while the sum is 35.

The square root of 51533549 is about 7178.6871362388. The cubic root of 51533549 is about 372.1317147370.

The spelling of 51533549 in words is "fifty-one million, five hundred thirty-three thousand, five hundred forty-nine".