31223350073 has 2 divisors, whose sum is σ = 31223350074. Its totient is φ = 31223350072.

The previous prime is 31223350031. The next prime is 31223350087. The reversal of 31223350073 is 37005332213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31085921344 + 137428729 = 176312^2 + 11723^2 .

It is a cyclic number.

It is not a de Polignac number, because 31223350073 - 2¹⁰ = 31223349049 is a prime.

It is a super-2 number, since 2×31223350073² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31223350013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611675036 + 15611675037.

It is an arithmetic number, because the mean of its divisors is an integer number (15611675037).

Almost surely, 2^31223350073 is an apocalyptic number.

It is an amenable number.

31223350073 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223350073 is an equidigital number, since it uses as much as digits as its factorization.

31223350073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 29.

Adding to 31223350073 its reverse (37005332213), we get a palindrome (68228682286).

The spelling of 31223350073 in words is "thirty-one billion, two hundred twenty-three million, three hundred fifty thousand, seventy-three".