31004221379 has 2 divisors, whose sum is σ = 31004221380. Its totient is φ = 31004221378.

The previous prime is 31004221331. The next prime is 31004221387. The reversal of 31004221379 is 97312240013.

It is a strong prime.

It is an emirp because it is prime and its reverse (97312240013) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31004221379 is a prime.

It is a super-2 number, since 2×31004221379² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31004221309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15502110689 + 15502110690.

It is an arithmetic number, because the mean of its divisors is an integer number (15502110690).

Almost surely, 2^31004221379 is an apocalyptic number.

31004221379 is a deficient number, since it is larger than the sum of its proper divisors (1).

31004221379 is an equidigital number, since it uses as much as digits as its factorization.

31004221379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 31004221379 in words is "thirty-one billion, four million, two hundred twenty-one thousand, three hundred seventy-nine".