31201313 has 8 divisors (see below), whose sum is σ = 36656256. Its totient is φ = 26182800.

The previous prime is 31201309. The next prime is 31201321. The reversal of 31201313 is 31310213.

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 31201313 - 2² = 31201309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31201343) 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, 108953 + ... + 109238.

It is an arithmetic number, because the mean of its divisors is an integer number (4582032).

Almost surely, 2^31201313 is an apocalyptic number.

It is an amenable number.

31201313 is a deficient number, since it is larger than the sum of its proper divisors (5454943).

31201313 is a wasteful number, since it uses less digits than its factorization.

31201313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218215.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 31201313 is about 5585.8135486248. The cubic root of 31201313 is about 314.8165993797.

Adding to 31201313 its reverse (31310213), we get a palindrome (62511526).

Subtracting 31201313 from its reverse (31310213), we obtain a square (108900 = 330²).

The spelling of 31201313 in words is "thirty-one million, two hundred one thousand, three hundred thirteen".