52545509 has 2 divisors, whose sum is σ = 52545510. Its totient is φ = 52545508.

The previous prime is 52545497. The next prime is 52545523. The reversal of 52545509 is 90554525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29052100 + 23493409 = 5390^2 + 4847^2 .

It is a cyclic number.

It is not a de Polignac number, because 52545509 - 2⁸ = 52545253 is a prime.

It is a super-2 number, since 2×52545509² = 5522061032138162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52545539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26272754 + 26272755.

It is an arithmetic number, because the mean of its divisors is an integer number (26272755).

Almost surely, 2^52545509 is an apocalyptic number.

It is an amenable number.

52545509 is a deficient number, since it is larger than the sum of its proper divisors (1).

52545509 is an equidigital number, since it uses as much as digits as its factorization.

52545509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 52545509 is about 7248.8281121848. The cubic root of 52545509 is about 374.5517821117.

The spelling of 52545509 in words is "fifty-two million, five hundred forty-five thousand, five hundred nine".