31481011 has 2 divisors, whose sum is σ = 31481012. Its totient is φ = 31481010.

The previous prime is 31480973. The next prime is 31481039. The reversal of 31481011 is 11018413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31481011 - 2¹⁷ = 31349939 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31481011.

It is not a weakly prime, because it can be changed into another prime (31481111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15740505 + 15740506.

It is an arithmetic number, because the mean of its divisors is an integer number (15740506).

Almost surely, 2^31481011 is an apocalyptic number.

31481011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31481011 is an equidigital number, since it uses as much as digits as its factorization.

31481011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 31481011 is about 5610.7941505637. The cubic root of 31481011 is about 315.7545060936.

Adding to 31481011 its reverse (11018413), we get a palindrome (42499424).

It can be divided in two parts, 314810 and 11, that added together give a triangular number (314821 = T₇₉₃).

The spelling of 31481011 in words is "thirty-one million, four hundred eighty-one thousand, eleven".