31231131100219 has 2 divisors, whose sum is σ = 31231131100220. Its totient is φ = 31231131100218.

The previous prime is 31231131100157. The next prime is 31231131100271. The reversal of 31231131100219 is 91200113113213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31231131100219 - 2³⁵ = 31196771361851 is a prime.

It is a super-2 number, since 2×31231131100219² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31231131100019) 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 as a sum of consecutive naturals, namely, 15615565550109 + 15615565550110.

It is an arithmetic number, because the mean of its divisors is an integer number (15615565550110).

Almost surely, 2^{31231131100219} is an apocalyptic number.

31231131100219 is a deficient number, since it is larger than the sum of its proper divisors (1).

31231131100219 is an equidigital number, since it uses as much as digits as its factorization.

31231131100219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

The spelling of 31231131100219 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred thirty-one million, one hundred thousand, two hundred nineteen".