31203223241 has 2 divisors, whose sum is σ = 31203223242. Its totient is φ = 31203223240.

The previous prime is 31203223213. The next prime is 31203223253. The reversal of 31203223241 is 14232230213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16172463241 + 15030760000 = 127171^2 + 122600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31203223241 is a prime.

It is a super-2 number, since 2×31203223241² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31203423241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15601611620 + 15601611621.

It is an arithmetic number, because the mean of its divisors is an integer number (15601611621).

Almost surely, 2^31203223241 is an apocalyptic number.

It is an amenable number.

31203223241 is a deficient number, since it is larger than the sum of its proper divisors (1).

31203223241 is an equidigital number, since it uses as much as digits as its factorization.

31203223241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31203223241 its reverse (14232230213), we get a palindrome (45435453454).

The spelling of 31203223241 in words is "thirty-one billion, two hundred three million, two hundred twenty-three thousand, two hundred forty-one".