31061113 has 2 divisors, whose sum is σ = 31061114. Its totient is φ = 31061112.

The previous prime is 31061111. The next prime is 31061119. The reversal of 31061113 is 31116013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18079504 + 12981609 = 4252^2 + 3603^2 .

It is an emirp because it is prime and its reverse (31116013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31061113 - 2¹ = 31061111 is a prime.

Together with 31061111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31061111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15530556 + 15530557.

It is an arithmetic number, because the mean of its divisors is an integer number (15530557).

Almost surely, 2^31061113 is an apocalyptic number.

It is an amenable number.

31061113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31061113 is an equidigital number, since it uses as much as digits as its factorization.

31061113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 31061113 is about 5573.2497701072. The cubic root of 31061113 is about 314.3443589797.

Adding to 31061113 its reverse (31116013), we get a palindrome (62177126).

The spelling of 31061113 in words is "thirty-one million, sixty-one thousand, one hundred thirteen".