2231240 has 48 divisors (see below), whose sum is σ = 5530140. Its totient is φ = 809600.

The previous prime is 2231219. The next prime is 2231269. The reversal of 2231240 is 421322.

It can be written as a sum of positive squares in 2 ways, for example, as 2172676 + 58564 = 1474^2 + 242^2 .

It is a super-3 number, since 3×2231240³ = 33324229429351872000, which contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4610 + ... + 5070.

2^2231240 is an apocalyptic number.

2231240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2231240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2765070).

2231240 is an abundant number, since it is smaller than the sum of its proper divisors (3298900).

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

2231240 is a wasteful number, since it uses less digits than its factorization.

2231240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2231240 is about 1493.7335773156. The cubic root of 2231240 is about 130.6718668392.

Adding to 2231240 its reverse (421322), we get a palindrome (2652562).

The spelling of 2231240 in words is "two million, two hundred thirty-one thousand, two hundred forty".