31414431 has 4 divisors (see below), whose sum is σ = 41885912. Its totient is φ = 20942952.

The previous prime is 31414387. The next prime is 31414463. The reversal of 31414431 is 13441413.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31414431 - 2⁶ = 31414367 is a prime.

It is a super-2 number, since 2×31414431² = 1973732950107522, 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 = 31414398 and 31414407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31414231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5235736 + ... + 5235741.

It is an arithmetic number, because the mean of its divisors is an integer number (10471478).

Almost surely, 2^31414431 is an apocalyptic number.

31414431 is a deficient number, since it is larger than the sum of its proper divisors (10471481).

31414431 is a wasteful number, since it uses less digits than its factorization.

31414431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10471480.

The product of its digits is 576, while the sum is 21.

The square root of 31414431 is about 5604.8578037270. The cubic root of 31414431 is about 315.5317498729.

Adding to 31414431 its reverse (13441413), we get a palindrome (44855844).

The spelling of 31414431 in words is "thirty-one million, four hundred fourteen thousand, four hundred thirty-one".