645141302231 has 2 divisors, whose sum is σ = 645141302232. Its totient is φ = 645141302230.

The previous prime is 645141302227. The next prime is 645141302243. The reversal of 645141302231 is 132203141546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645141302231 - 2² = 645141302227 is a prime.

It is a super-2 number, since 2×645141302231² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645141302291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322570651115 + 322570651116.

It is an arithmetic number, because the mean of its divisors is an integer number (322570651116).

Almost surely, 2^645141302231 is an apocalyptic number.

645141302231 is a deficient number, since it is larger than the sum of its proper divisors (1).

645141302231 is an equidigital number, since it uses as much as digits as its factorization.

645141302231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 645141302231 its reverse (132203141546), we get a palindrome (777344443777).

The spelling of 645141302231 in words is "six hundred forty-five billion, one hundred forty-one million, three hundred two thousand, two hundred thirty-one".