2731231 has 8 divisors (see below), whose sum is σ = 2942720. Its totient is φ = 2526552.

The previous prime is 2731207. The next prime is 2731241. The reversal of 2731231 is 1321372.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2731231 - 2⁵ = 2731199 is a prime.

It is a super-2 number, since 2×2731231² = 14919245550722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

2731231 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 2731199 and 2731208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2731241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855 + ... + 2488.

It is an arithmetic number, because the mean of its divisors is an integer number (367840).

2^2731231 is an apocalyptic number.

2731231 is a deficient number, since it is larger than the sum of its proper divisors (211489).

2731231 is a wasteful number, since it uses less digits than its factorization.

2731231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405.

The product of its digits is 252, while the sum is 19.

The square root of 2731231 is about 1652.6436397481. The cubic root of 2731231 is about 139.7825024168.

The spelling of 2731231 in words is "two million, seven hundred thirty-one thousand, two hundred thirty-one".