31423253 has 2 divisors, whose sum is σ = 31423254. Its totient is φ = 31423252.

The previous prime is 31423241. The next prime is 31423291. The reversal of 31423253 is 35232413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29343889 + 2079364 = 5417^2 + 1442^2 .

It is a cyclic number.

It is not a de Polignac number, because 31423253 - 2⁴ = 31423237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31423453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711626 + 15711627.

It is an arithmetic number, because the mean of its divisors is an integer number (15711627).

Almost surely, 2^31423253 is an apocalyptic number.

It is an amenable number.

31423253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423253 is an equidigital number, since it uses as much as digits as its factorization.

31423253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 23.

The square root of 31423253 is about 5605.6447443626. The cubic root of 31423253 is about 315.5612836516.

Adding to 31423253 its reverse (35232413), we get a palindrome (66655666).

The spelling of 31423253 in words is "thirty-one million, four hundred twenty-three thousand, two hundred fifty-three".