2144360261 has 4 divisors (see below), whose sum is σ = 2147464224. Its totient is φ = 2141256300.

The previous prime is 2144360233. The next prime is 2144360287. The reversal of 2144360261 is 1620634412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2144360261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144360201) 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, 1550945 + ... + 1552326.

It is an arithmetic number, because the mean of its divisors is an integer number (536866056).

Almost surely, 2^2144360261 is an apocalyptic number.

It is an amenable number.

2144360261 is a deficient number, since it is larger than the sum of its proper divisors (3103963).

2144360261 is an equidigital number, since it uses as much as digits as its factorization.

2144360261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3103962.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 2144360261 is about 46307.2376740397. The cubic root of 2144360261 is about 1289.5333650654.

Adding to 2144360261 its reverse (1620634412), we get a palindrome (3764994673).

The spelling of 2144360261 in words is "two billion, one hundred forty-four million, three hundred sixty thousand, two hundred sixty-one".