31232221100252 has 12 divisors (see below), whose sum is σ = 56541089923080. Its totient is φ = 15077623979376.

The previous prime is 31232221100251. The next prime is 31232221100303. The reversal of 31232221100252 is 25200112223213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31232221100251) 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, 134621642558 + ... + 134621642789.

It is an arithmetic number, because the mean of its divisors is an integer number (4711757493590).

Almost surely, 2^{31232221100252} is an apocalyptic number.

It is an amenable number.

31232221100252 is a deficient number, since it is larger than the sum of its proper divisors (25308868822828).

31232221100252 is a wasteful number, since it uses less digits than its factorization.

31232221100252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269243285380 (or 269243285378 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 31232221100252 its reverse (25200112223213), we get a palindrome (56432333323465).

The spelling of 31232221100252 in words is "thirty-one trillion, two hundred thirty-two billion, two hundred twenty-one million, one hundred thousand, two hundred fifty-two".