253445045531 has 2 divisors, whose sum is σ = 253445045532. Its totient is φ = 253445045530.

The previous prime is 253445045527. The next prime is 253445045533. The reversal of 253445045531 is 135540544352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253445045531 - 2² = 253445045527 is a prime.

It is a super-2 number, since 2×253445045531² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 253445045533, 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 (253445045533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126722522765 + 126722522766.

It is an arithmetic number, because the mean of its divisors is an integer number (126722522766).

Almost surely, 2^253445045531 is an apocalyptic number.

253445045531 is a deficient number, since it is larger than the sum of its proper divisors (1).

253445045531 is an equidigital number, since it uses as much as digits as its factorization.

253445045531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720000, while the sum is 41.

Adding to 253445045531 its reverse (135540544352), we get a palindrome (388985589883).

The spelling of 253445045531 in words is "two hundred fifty-three billion, four hundred forty-five million, forty-five thousand, five hundred thirty-one".