31440213031300 has 18 divisors (see below), whose sum is σ = 68225262278138. Its totient is φ = 12576085212480.

The previous prime is 31440213031237. The next prime is 31440213031309. The reversal of 31440213031300 is 313031204413.

It can be written as a sum of positive squares in 3 ways, for example, as 640643361604 + 30799569669696 = 800402^2 + 5549736^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (31440213031309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 157201065057 + ... + 157201065256.

Almost surely, 2^{31440213031300} is an apocalyptic number.

It is an amenable number.

31440213031300 is an abundant number, since it is smaller than the sum of its proper divisors (36785049246838).

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

31440213031300 is a wasteful number, since it uses less digits than its factorization.

31440213031300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314402130327 (or 314402130320 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31440213031300 its reverse (313031204413), we get a palindrome (31753244235713).

The spelling of 31440213031300 in words is "thirty-one trillion, four hundred forty billion, two hundred thirteen million, thirty-one thousand, three hundred".