2140244237 has 4 divisors (see below), whose sum is σ = 2161434876. Its totient is φ = 2119053600.

The previous prime is 2140244219. The next prime is 2140244261. The reversal of 2140244237 is 7324420412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 941630596 + 1198613641 = 30686^2 + 34621^2 .

It is a cyclic number.

It is not a de Polignac number, because 2140244237 - 2⁶ = 2140244173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140244137) 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, 10595168 + ... + 10595369.

It is an arithmetic number, because the mean of its divisors is an integer number (540358719).

Almost surely, 2^2140244237 is an apocalyptic number.

It is an amenable number.

2140244237 is a deficient number, since it is larger than the sum of its proper divisors (21190639).

2140244237 is a wasteful number, since it uses less digits than its factorization.

2140244237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21190638.

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 2140244237 is about 46262.7737711435. The cubic root of 2140244237 is about 1288.7077653104.

Adding to 2140244237 its reverse (7324420412), we get a palindrome (9464664649).

The spelling of 2140244237 in words is "two billion, one hundred forty million, two hundred forty-four thousand, two hundred thirty-seven".