2145273239 has 4 divisors (see below), whose sum is σ = 2145436440. Its totient is φ = 2145110040.

The previous prime is 2145273211. The next prime is 2145273241. The reversal of 2145273239 is 9323725412.

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 2145273239 - 2²⁴ = 2128496023 is a prime.

It is a super-2 number, since 2×2145273239² = 9204394539939102242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145273259) 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, 59972 + ... + 88809.

It is an arithmetic number, because the mean of its divisors is an integer number (536359110).

Almost surely, 2^2145273239 is an apocalyptic number.

2145273239 is a deficient number, since it is larger than the sum of its proper divisors (163201).

2145273239 is a wasteful number, since it uses less digits than its factorization.

2145273239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163200.

The product of its digits is 90720, while the sum is 38.

The square root of 2145273239 is about 46317.0944576622. The cubic root of 2145273239 is about 1289.7163487070.

The spelling of 2145273239 in words is "two billion, one hundred forty-five million, two hundred seventy-three thousand, two hundred thirty-nine".