31343421 has 8 divisors (see below), whose sum is σ = 41836320. Its totient is φ = 20873072.

The previous prime is 31343419. The next prime is 31343423. The reversal of 31343421 is 12434313.

It is an interprime number because it is at equal distance from previous prime (31343419) and next prime (31343423).

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 31343421 - 2¹ = 31343419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31343423) 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, 2070 + ... + 8183.

It is an arithmetic number, because the mean of its divisors is an integer number (5229540).

Almost surely, 2^31343421 is an apocalyptic number.

It is an amenable number.

31343421 is a deficient number, since it is larger than the sum of its proper divisors (10492899).

31343421 is a wasteful number, since it uses less digits than its factorization.

31343421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11275.

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

The square root of 31343421 is about 5598.5195364489. The cubic root of 31343421 is about 315.2938251105.

Adding to 31343421 its reverse (12434313), we get a palindrome (43777734).

It can be divided in two parts, 3134 and 3421, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 31343421 in words is "thirty-one million, three hundred forty-three thousand, four hundred twenty-one".