53643511 has 2 divisors, whose sum is σ = 53643512. Its totient is φ = 53643510.

The previous prime is 53643509. The next prime is 53643523. The reversal of 53643511 is 11534635.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53643511 - 2¹ = 53643509 is a prime.

Together with 53643509, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 53643511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53649511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26821755 + 26821756.

It is an arithmetic number, because the mean of its divisors is an integer number (26821756).

Almost surely, 2^53643511 is an apocalyptic number.

53643511 is a deficient number, since it is larger than the sum of its proper divisors (1).

53643511 is an equidigital number, since it uses as much as digits as its factorization.

53643511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 28.

The square root of 53643511 is about 7324.1730591241. The cubic root of 53643511 is about 377.1427223602.

The spelling of 53643511 in words is "fifty-three million, six hundred forty-three thousand, five hundred eleven".