31342331 has 4 divisors (see below), whose sum is σ = 31771752. Its totient is φ = 30912912.

The previous prime is 31342319. The next prime is 31342351. The reversal of 31342331 is 13324313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13324313 = 587 ⋅22699.

It is a cyclic number.

It is not a de Polignac number, because 31342331 - 2¹⁸ = 31080187 is a prime.

It is a super-2 number, since 2×31342331² = 1964683425027122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31342351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214601 + ... + 214746.

It is an arithmetic number, because the mean of its divisors is an integer number (7942938).

Almost surely, 2^31342331 is an apocalyptic number.

31342331 is a deficient number, since it is larger than the sum of its proper divisors (429421).

31342331 is an equidigital number, since it uses as much as digits as its factorization.

31342331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429420.

The product of its digits is 648, while the sum is 20.

The square root of 31342331 is about 5598.4221884385. The cubic root of 31342331 is about 315.2901701781.

Adding to 31342331 its reverse (13324313), we get a palindrome (44666644).

The spelling of 31342331 in words is "thirty-one million, three hundred forty-two thousand, three hundred thirty-one".