31300213 has 16 divisors (see below), whose sum is σ = 38344320. Its totient is φ = 24938496.

The previous prime is 31300207. The next prime is 31300219. The reversal of 31300213 is 31200313.

It is an interprime number because it is at equal distance from previous prime (31300207) and next prime (31300219).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31300213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31300193 and 31300202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8293 + ... + 11461.

It is an arithmetic number, because the mean of its divisors is an integer number (2396520).

Almost surely, 2^31300213 is an apocalyptic number.

It is an amenable number.

31300213 is a deficient number, since it is larger than the sum of its proper divisors (7044107).

31300213 is a wasteful number, since it uses less digits than its factorization.

31300213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 31300213 is about 5594.6593283238. The cubic root of 31300213 is about 315.1488773034.

Adding to 31300213 its reverse (31200313), we get a palindrome (62500526).

It can be divided in two parts, 31300 and 213, that added together give a palindrome (31513).

The spelling of 31300213 in words is "thirty-one million, three hundred thousand, two hundred thirteen".