52809905 has 16 divisors (see below), whose sum is σ = 68532480. Its totient is φ = 38913792.

The previous prime is 52809901. The next prime is 52809917. The reversal of 52809905 is 50990825.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 52809905 - 2² = 52809901 is a prime.

It is a super-2 number, since 2×52809905² = 5577772132218050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52809901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2615 + ... + 10604.

It is an arithmetic number, because the mean of its divisors is an integer number (4283280).

Almost surely, 2^52809905 is an apocalyptic number.

It is an amenable number.

52809905 is a deficient number, since it is larger than the sum of its proper divisors (15722575).

52809905 is a wasteful number, since it uses less digits than its factorization.

52809905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13288.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 52809905 is about 7267.0423832533. The cubic root of 52809905 is about 375.1789486668.

The spelling of 52809905 in words is "fifty-two million, eight hundred nine thousand, nine hundred five".