245564211331 has 2 divisors, whose sum is σ = 245564211332. Its totient is φ = 245564211330.

The previous prime is 245564211329. The next prime is 245564211397. The reversal of 245564211331 is 133112465542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245564211331 - 2¹ = 245564211329 is a prime.

It is a super-2 number, since 2×245564211331² (a number of 24 digits) contains 22 as substring.

Together with 245564211329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (245564211311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122782105665 + 122782105666.

It is an arithmetic number, because the mean of its divisors is an integer number (122782105666).

Almost surely, 2^245564211331 is an apocalyptic number.

245564211331 is a deficient number, since it is larger than the sum of its proper divisors (1).

245564211331 is an equidigital number, since it uses as much as digits as its factorization.

245564211331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 37.

Adding to 245564211331 its reverse (133112465542), we get a palindrome (378676676873).

The spelling of 245564211331 in words is "two hundred forty-five billion, five hundred sixty-four million, two hundred eleven thousand, three hundred thirty-one".