31344231 has 8 divisors (see below), whose sum is σ = 41941120. Its totient is φ = 20821752.

The previous prime is 31344227. The next prime is 31344233. The reversal of 31344231 is 13244313.

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

It is not a de Polignac number, because 31344231 - 2² = 31344227 is a prime.

It is a super-2 number, since 2×31344231² = 1964921633962722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31344198 and 31344207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31344233) 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, 17611 + ... + 19308.

It is an arithmetic number, because the mean of its divisors is an integer number (5242640).

Almost surely, 2^31344231 is an apocalyptic number.

31344231 is a deficient number, since it is larger than the sum of its proper divisors (10596889).

31344231 is a wasteful number, since it uses less digits than its factorization.

31344231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37205.

The product of its digits is 864, while the sum is 21.

The square root of 31344231 is about 5598.5918765347. The cubic root of 31344231 is about 315.2965411063.

Adding to 31344231 its reverse (13244313), we get a palindrome (44588544).

It can be divided in two parts, 313 and 44231, that added together give a palindrome (44544).

The spelling of 31344231 in words is "thirty-one million, three hundred forty-four thousand, two hundred thirty-one".