31223130301997 has 2 divisors, whose sum is σ = 31223130301998. Its totient is φ = 31223130301996.

The previous prime is 31223130301981. The next prime is 31223130302003. The reversal of 31223130301997 is 79910303132213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26986144442761 + 4236985859236 = 5194819^2 + 2058394^2 .

It is a cyclic number.

It is not a de Polignac number, because 31223130301997 - 2⁴ = 31223130301981 is a prime.

It is a super-3 number, since 3×31223130301997³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31223130301397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611565150998 + 15611565150999.

It is an arithmetic number, because the mean of its divisors is an integer number (15611565150999).

Almost surely, 2^{31223130301997} is an apocalyptic number.

It is an amenable number.

31223130301997 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223130301997 is an equidigital number, since it uses as much as digits as its factorization.

31223130301997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 44.

The spelling of 31223130301997 in words is "thirty-one trillion, two hundred twenty-three billion, one hundred thirty million, three hundred one thousand, nine hundred ninety-seven".