31230232221 has 8 divisors (see below), whose sum is σ = 42655927104. Its totient is φ = 20312346080.

The previous prime is 31230232219. The next prime is 31230232249. The reversal of 31230232221 is 12223203213.

It is a happy number.

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 31230232221 - 2¹ = 31230232219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230232261) 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, 126952041 + ... + 126952286.

It is an arithmetic number, because the mean of its divisors is an integer number (5331990888).

Almost surely, 2^31230232221 is an apocalyptic number.

It is an amenable number.

31230232221 is a deficient number, since it is larger than the sum of its proper divisors (11425694883).

31230232221 is a wasteful number, since it uses less digits than its factorization.

31230232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253904371.

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

Adding to 31230232221 its reverse (12223203213), we get a palindrome (43453435434).

The spelling of 31230232221 in words is "thirty-one billion, two hundred thirty million, two hundred thirty-two thousand, two hundred twenty-one".