533540921 has 2 divisors, whose sum is σ = 533540922. Its totient is φ = 533540920.

The previous prime is 533540879. The next prime is 533540923. The reversal of 533540921 is 129045335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485585296 + 47955625 = 22036^2 + 6925^2 .

It is a cyclic number.

It is not a de Polignac number, because 533540921 - 2⁶ = 533540857 is a prime.

Together with 533540923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (533540923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266770460 + 266770461.

It is an arithmetic number, because the mean of its divisors is an integer number (266770461).

Almost surely, 2^533540921 is an apocalyptic number.

It is an amenable number.

533540921 is a deficient number, since it is larger than the sum of its proper divisors (1).

533540921 is an equidigital number, since it uses as much as digits as its factorization.

533540921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 533540921 is about 23098.5047351555. The cubic root of 533540921 is about 811.0654682718.

The spelling of 533540921 in words is "five hundred thirty-three million, five hundred forty thousand, nine hundred twenty-one".