31443121300 has 36 divisors (see below), whose sum is σ = 68262137020. Its totient is φ = 12571614720.

The previous prime is 31443121289. The next prime is 31443121319. The reversal of 31443121300 is 312134413.

It can be written as a sum of positive squares in 6 ways, for example, as 4269576964 + 27173544336 = 65342^2 + 164844^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157612 + ... + 296188.

Almost surely, 2^31443121300 is an apocalyptic number.

It is an amenable number.

31443121300 is an abundant number, since it is smaller than the sum of its proper divisors (36819015720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31443121300 is a wasteful number, since it uses less digits than its factorization.

31443121300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140860 (or 140853 counting only the distinct ones).

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

Adding to 31443121300 its reverse (312134413), we get a palindrome (31755255713).

The spelling of 31443121300 in words is "thirty-one billion, four hundred forty-three million, one hundred twenty-one thousand, three hundred".