31401163 has 2 divisors, whose sum is σ = 31401164. Its totient is φ = 31401162.

The previous prime is 31401151. The next prime is 31401173. The reversal of 31401163 is 36110413.

It is a strong prime.

It is an emirp because it is prime and its reverse (36110413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31401163 - 2⁹ = 31400651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31401163.

It is not a weakly prime, because it can be changed into another prime (31401133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700581 + 15700582.

It is an arithmetic number, because the mean of its divisors is an integer number (15700582).

Almost surely, 2^31401163 is an apocalyptic number.

31401163 is a deficient number, since it is larger than the sum of its proper divisors (1).

31401163 is an equidigital number, since it uses as much as digits as its factorization.

31401163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 31401163 is about 5603.6740626128. The cubic root of 31401163 is about 315.4873216207.

Adding to 31401163 its reverse (36110413), we get a palindrome (67511576).

The spelling of 31401163 in words is "thirty-one million, four hundred one thousand, one hundred sixty-three".