31414213 has 8 divisors (see below), whose sum is σ = 32109048. Its totient is φ = 30723264.

The previous prime is 31414199. The next prime is 31414231. The reversal of 31414213 is 31241413.

It can be written as a sum of positive squares in 4 ways, for example, as 16305444 + 15108769 = 4038^2 + 3887^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31414213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31414613) 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 7 ways as a sum of consecutive naturals, for example, 20295 + ... + 21787.

It is an arithmetic number, because the mean of its divisors is an integer number (4013631).

Almost surely, 2^31414213 is an apocalyptic number.

It is an amenable number.

31414213 is a deficient number, since it is larger than the sum of its proper divisors (694835).

31414213 is a wasteful number, since it uses less digits than its factorization.

31414213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943.

The product of its digits is 288, while the sum is 19.

The square root of 31414213 is about 5604.8383562775. The cubic root of 31414213 is about 315.5310199951.

Adding to 31414213 its reverse (31241413), we get a palindrome (62655626).

The spelling of 31414213 in words is "thirty-one million, four hundred fourteen thousand, two hundred thirteen".