31231243210 has 8 divisors (see below), whose sum is σ = 56216237796. Its totient is φ = 12492497280.

The previous prime is 31231243187. The next prime is 31231243231. The reversal of 31231243210 is 1234213213.

It can be written as a sum of positive squares in 2 ways, for example, as 31209815569 + 21427641 = 176663^2 + 4629^2 .

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

It is a super-2 number, since 2×31231243210² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1561562151 + ... + 1561562170.

Almost surely, 2^31231243210 is an apocalyptic number.

31231243210 is a deficient number, since it is larger than the sum of its proper divisors (24984994586).

31231243210 is a wasteful number, since it uses less digits than its factorization.

31231243210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123124328.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31231243210 its reverse (1234213213), we get a palindrome (32465456423).

The spelling of 31231243210 in words is "thirty-one billion, two hundred thirty-one million, two hundred forty-three thousand, two hundred ten".