2145272361 has 32 divisors (see below), whose sum is σ = 3044770560. Its totient is φ = 1341360384.

The previous prime is 2145272333. The next prime is 2145272369. The reversal of 2145272361 is 1632725412.

It is not a de Polignac number, because 2145272361 - 2⁵ = 2145272329 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2145272369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 472675 + ... + 477191.

It is an arithmetic number, because the mean of its divisors is an integer number (95149080).

Almost surely, 2^2145272361 is an apocalyptic number.

It is an amenable number.

2145272361 is a deficient number, since it is larger than the sum of its proper divisors (899498199).

2145272361 is a wasteful number, since it uses less digits than its factorization.

2145272361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4705.

The product of its digits is 20160, while the sum is 33.

The square root of 2145272361 is about 46317.0849795192. The cubic root of 2145272361 is about 1289.7161727588.

Adding to 2145272361 its reverse (1632725412), we get a palindrome (3777997773).

The spelling of 2145272361 in words is "two billion, one hundred forty-five million, two hundred seventy-two thousand, three hundred sixty-one".