2231272240 has 20 divisors (see below), whose sum is σ = 5187708144. Its totient is φ = 892508864.

The previous prime is 2231272217. The next prime is 2231272243. The reversal of 2231272240 is 422721322.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×2231272240³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2231272243) 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, 13945372 + ... + 13945531.

Almost surely, 2^2231272240 is an apocalyptic number.

2231272240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2231272240 is an abundant number, since it is smaller than the sum of its proper divisors (2956435904).

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

2231272240 is a wasteful number, since it uses less digits than its factorization.

2231272240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27890916 (or 27890910 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 2231272240 is about 47236.3444817653. The cubic root of 2231272240 is about 1306.7249621130.

Adding to 2231272240 its reverse (422721322), we get a palindrome (2653993562).

The spelling of 2231272240 in words is "two billion, two hundred thirty-one million, two hundred seventy-two thousand, two hundred forty".