31320020219 has 2 divisors, whose sum is σ = 31320020220. Its totient is φ = 31320020218.

The previous prime is 31320020191. The next prime is 31320020243. The reversal of 31320020219 is 91202002313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31320020219 - 2²⁴ = 31303243003 is a prime.

It is a super-2 number, since 2×31320020219² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31320020194 and 31320020203.

It is not a weakly prime, because it can be changed into another prime (31320026219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660010109 + 15660010110.

It is an arithmetic number, because the mean of its divisors is an integer number (15660010110).

Almost surely, 2^31320020219 is an apocalyptic number.

31320020219 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320020219 is an equidigital number, since it uses as much as digits as its factorization.

31320020219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 31320020219 in words is "thirty-one billion, three hundred twenty million, twenty thousand, two hundred nineteen".