2145645531031 has 2 divisors, whose sum is σ = 2145645531032. Its totient is φ = 2145645531030.

The previous prime is 2145645530981. The next prime is 2145645531041. The reversal of 2145645531031 is 1301355465412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2145645531031 - 2²⁷ = 2145511313303 is a prime.

It is a super-2 number, since 2×2145645531031² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145645531041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072822765515 + 1072822765516.

It is an arithmetic number, because the mean of its divisors is an integer number (1072822765516).

Almost surely, 2^{2145645531031} is an apocalyptic number.

2145645531031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145645531031 is an equidigital number, since it uses as much as digits as its factorization.

2145645531031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 2145645531031 in words is "two trillion, one hundred forty-five billion, six hundred forty-five million, five hundred thirty-one thousand, thirty-one".