31000213223 has 8 divisors (see below), whose sum is σ = 35454630048. Its totient is φ = 26552250144.

The previous prime is 31000213117. The next prime is 31000213241. The reversal of 31000213223 is 32231200013.

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

It is not a de Polignac number, because 31000213223 - 2¹⁴ = 31000196839 is a prime.

It is a super-2 number, since 2×31000213223² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000219223) 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, 1603136 + ... + 1622357.

It is an arithmetic number, because the mean of its divisors is an integer number (4431828756).

Almost surely, 2^31000213223 is an apocalyptic number.

31000213223 is a deficient number, since it is larger than the sum of its proper divisors (4454416825).

31000213223 is a wasteful number, since it uses less digits than its factorization.

31000213223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3226873.

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

Adding to 31000213223 its reverse (32231200013), we get a palindrome (63231413236).

The spelling of 31000213223 in words is "thirty-one billion, two hundred thirteen thousand, two hundred twenty-three".