31003230221 has 8 divisors (see below), whose sum is σ = 32891950080. Its totient is φ = 29140207488.

The previous prime is 31003230199. The next prime is 31003230241. The reversal of 31003230221 is 12203230013.

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

It is a cyclic number.

It is not a de Polignac number, because 31003230221 - 2¹⁸ = 31002968077 is a prime.

It is a super-2 number, since 2×31003230221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31003230221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31003230241) 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, 6421796 + ... + 6426621.

It is an arithmetic number, because the mean of its divisors is an integer number (4111493760).

Almost surely, 2^31003230221 is an apocalyptic number.

It is an amenable number.

31003230221 is a deficient number, since it is larger than the sum of its proper divisors (1888719859).

31003230221 is a wasteful number, since it uses less digits than its factorization.

31003230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12848563.

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

Adding to 31003230221 its reverse (12203230013), we get a palindrome (43206460234).

The spelling of 31003230221 in words is "thirty-one billion, three million, two hundred thirty thousand, two hundred twenty-one".