31303420042243 has 2 divisors, whose sum is σ = 31303420042244. Its totient is φ = 31303420042242.

The previous prime is 31303420042199. The next prime is 31303420042267. The reversal of 31303420042243 is 34224002430313.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31303420042243 - 2²⁹ = 31302883171331 is a prime.

It is a super-2 number, since 2×31303420042243² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31303420045243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15651710021121 + 15651710021122.

It is an arithmetic number, because the mean of its divisors is an integer number (15651710021122).

Almost surely, 2^{31303420042243} is an apocalyptic number.

31303420042243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31303420042243 is an equidigital number, since it uses as much as digits as its factorization.

31303420042243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 31303420042243 its reverse (34224002430313), we get a palindrome (65527422472556).

The spelling of 31303420042243 in words is "thirty-one trillion, three hundred three billion, four hundred twenty million, forty-two thousand, two hundred forty-three".