2140221240 has 48 divisors (see below), whose sum is σ = 6955720200. Its totient is φ = 570725568.

The previous prime is 2140221203. The next prime is 2140221247. The reversal of 2140221240 is 421220412.

2140221240 is a `hidden beast` number, since 2 + 1 + 402 + 21 + 240 = 666.

It is a super-2 number, since 2×2140221240² = 9161093912294275200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140221247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2972170 + ... + 2972889.

Almost surely, 2^2140221240 is an apocalyptic number.

2140221240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2140221240 is an abundant number, since it is smaller than the sum of its proper divisors (4815498960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2140221240 is a wasteful number, since it uses less digits than its factorization.

2140221240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5945076 (or 5945069 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2140221240 is about 46262.5252229059. The cubic root of 2140221240 is about 1288.7031495570.

Adding to 2140221240 its reverse (421220412), we get a palindrome (2561441652).

The spelling of 2140221240 in words is "two billion, one hundred forty million, two hundred twenty-one thousand, two hundred forty".