31342431 has 8 divisors (see below), whose sum is σ = 41883184. Its totient is φ = 20848320.

The previous prime is 31342429. The next prime is 31342439. The reversal of 31342431 is 13424313.

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

It is not a de Polignac number, because 31342431 - 2¹ = 31342429 is a prime.

It is a super-2 number, since 2×31342431² = 1964695961979522, 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 = 31342398 and 31342407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31342439) 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 7 ways as a sum of consecutive naturals, for example, 10060 + ... + 12801.

It is an arithmetic number, because the mean of its divisors is an integer number (5235398).

Almost surely, 2^31342431 is an apocalyptic number.

31342431 is a deficient number, since it is larger than the sum of its proper divisors (10540753).

31342431 is a wasteful number, since it uses less digits than its factorization.

31342431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23321.

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

The square root of 31342431 is about 5598.4311195191. The cubic root of 31342431 is about 315.2905054965.

Adding to 31342431 its reverse (13424313), we get a palindrome (44766744).

It can be divided in two parts, 3134 and 2431, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 31342431 in words is "thirty-one million, three hundred forty-two thousand, four hundred thirty-one".