31030220213 has 4 divisors (see below), whose sum is σ = 31060086720. Its totient is φ = 31000353708.

The previous prime is 31030220201. The next prime is 31030220219. The reversal of 31030220213 is 31202203013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31202203013 = 167 ⋅186839539.

It is a cyclic number.

It is not a de Polignac number, because 31030220213 - 2⁶ = 31030220149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31030220191 and 31030220200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31030220219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14931695 + ... + 14933772.

It is an arithmetic number, because the mean of its divisors is an integer number (7765021680).

Almost surely, 2^31030220213 is an apocalyptic number.

It is an amenable number.

31030220213 is a deficient number, since it is larger than the sum of its proper divisors (29866507).

31030220213 is a wasteful number, since it uses less digits than its factorization.

31030220213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29866506.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31030220213 its reverse (31202203013), we get a palindrome (62232423226).

The spelling of 31030220213 in words is "thirty-one billion, thirty million, two hundred twenty thousand, two hundred thirteen".