2321561205145 has 32 divisors (see below), whose sum is σ = 3498742195200. Its totient is φ = 1469471693760.

The previous prime is 2321561205137. The next prime is 2321561205157. The reversal of 2321561205145 is 5415021651232.

2321561205145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2321561205145 - 2³ = 2321561205137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52042321 + ... + 52086910.

It is an arithmetic number, because the mean of its divisors is an integer number (109335693600).

Almost surely, 2^{2321561205145} is an apocalyptic number.

It is an amenable number.

2321561205145 is a deficient number, since it is larger than the sum of its proper divisors (1177180990055).

2321561205145 is a wasteful number, since it uses less digits than its factorization.

2321561205145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104129270 (or 104129256 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 2321561205145 its reverse (5415021651232), we get a palindrome (7736582856377).

The spelling of 2321561205145 in words is "two trillion, three hundred twenty-one billion, five hundred sixty-one million, two hundred five thousand, one hundred forty-five".