31030222213 has 4 divisors (see below), whose sum is σ = 32855529420. Its totient is φ = 29204915008.

The previous prime is 31030222189. The next prime is 31030222253. The reversal of 31030222213 is 31222203013.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10427064769 + 20603157444 = 102113^2 + 143538^2 .

It is a cyclic number.

It is not a de Polignac number, because 31030222213 - 2²¹ = 31028125061 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 (31030222253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912653578 + ... + 912653611.

It is an arithmetic number, because the mean of its divisors is an integer number (8213882355).

Almost surely, 2^31030222213 is an apocalyptic number.

It is an amenable number.

31030222213 is a deficient number, since it is larger than the sum of its proper divisors (1825307207).

31030222213 is a wasteful number, since it uses less digits than its factorization.

31030222213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825307206.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31030222213 its reverse (31222203013), we get a palindrome (62252425226).

The spelling of 31030222213 in words is "thirty-one billion, thirty million, two hundred twenty-two thousand, two hundred thirteen".