31210340223 has 4 divisors (see below), whose sum is σ = 41613786968. Its totient is φ = 20806893480.

The previous prime is 31210340221. The next prime is 31210340257. The reversal of 31210340223 is 32204301213.

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

It is not a de Polignac number, because 31210340223 - 2¹ = 31210340221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31210340223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31210340221) 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, 5201723368 + ... + 5201723373.

It is an arithmetic number, because the mean of its divisors is an integer number (10403446742).

Almost surely, 2^31210340223 is an apocalyptic number.

31210340223 is a deficient number, since it is larger than the sum of its proper divisors (10403446745).

31210340223 is a wasteful number, since it uses less digits than its factorization.

31210340223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10403446744.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31210340223 its reverse (32204301213), we get a palindrome (63414641436).

The spelling of 31210340223 in words is "thirty-one billion, two hundred ten million, three hundred forty thousand, two hundred twenty-three".