2145205102231 has 4 divisors (see below), whose sum is σ = 2149306833352. Its totient is φ = 2141103371112.

The previous prime is 2145205102223. The next prime is 2145205102241. The reversal of 2145205102231 is 1322015025412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2145205102231 - 2³ = 2145205102223 is a prime.

It is a super-2 number, since 2×2145205102231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2145205102231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145205102241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2050864776 + ... + 2050865821.

It is an arithmetic number, because the mean of its divisors is an integer number (537326708338).

Almost surely, 2^{2145205102231} is an apocalyptic number.

2145205102231 is a deficient number, since it is larger than the sum of its proper divisors (4101731121).

2145205102231 is an equidigital number, since it uses as much as digits as its factorization.

2145205102231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101731120.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 2145205102231 in words is "two trillion, one hundred forty-five billion, two hundred five million, one hundred two thousand, two hundred thirty-one".