31213344133403 has 2 divisors, whose sum is σ = 31213344133404. Its totient is φ = 31213344133402.

The previous prime is 31213344133399. The next prime is 31213344133423. The reversal of 31213344133403 is 30433144331213.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31213344133403 - 2² = 31213344133399 is a prime.

It is not a weakly prime, because it can be changed into another prime (31213344133423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606672066701 + 15606672066702.

It is an arithmetic number, because the mean of its divisors is an integer number (15606672066702).

Almost surely, 2^{31213344133403} is an apocalyptic number.

31213344133403 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213344133403 is an equidigital number, since it uses as much as digits as its factorization.

31213344133403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 35.

Adding to 31213344133403 its reverse (30433144331213), we get a palindrome (61646488464616).

The spelling of 31213344133403 in words is "thirty-one trillion, two hundred thirteen billion, three hundred forty-four million, one hundred thirty-three thousand, four hundred three".