31203223253 has 2 divisors, whose sum is σ = 31203223254. Its totient is φ = 31203223252.

The previous prime is 31203223241. The next prime is 31203223273. The reversal of 31203223253 is 35232230213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23960872849 + 7242350404 = 154793^2 + 85102^2 .

It is a cyclic number.

It is not a de Polignac number, because 31203223253 - 2⁸ = 31203222997 is a prime.

It is a super-2 number, since 2×31203223253² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31203223213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15601611626 + 15601611627.

It is an arithmetic number, because the mean of its divisors is an integer number (15601611627).

Almost surely, 2^31203223253 is an apocalyptic number.

It is an amenable number.

31203223253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31203223253 is an equidigital number, since it uses as much as digits as its factorization.

31203223253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 26.

Adding to 31203223253 its reverse (35232230213), we get a palindrome (66435453466).

The spelling of 31203223253 in words is "thirty-one billion, two hundred three million, two hundred twenty-three thousand, two hundred fifty-three".