533640257 has 2 divisors, whose sum is σ = 533640258. Its totient is φ = 533640256.

The previous prime is 533640253. The next prime is 533640259. The reversal of 533640257 is 752046335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 514200976 + 19439281 = 22676^2 + 4409^2 .

It is a cyclic number.

It is not a de Polignac number, because 533640257 - 2² = 533640253 is a prime.

Together with 533640259, 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 (533640253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266820128 + 266820129.

It is an arithmetic number, because the mean of its divisors is an integer number (266820129).

Almost surely, 2^533640257 is an apocalyptic number.

It is an amenable number.

533640257 is a deficient number, since it is larger than the sum of its proper divisors (1).

533640257 is an equidigital number, since it uses as much as digits as its factorization.

533640257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 35.

The square root of 533640257 is about 23100.6549041364. The cubic root of 533640257 is about 811.1158005560.

The spelling of 533640257 in words is "five hundred thirty-three million, six hundred forty thousand, two hundred fifty-seven".