31355113 has 4 divisors (see below), whose sum is σ = 31565700. Its totient is φ = 31144528.

The previous prime is 31355099. The next prime is 31355131. The reversal of 31355113 is 31155313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14684224 + 16670889 = 3832^2 + 4083^2 .

It is a cyclic number.

It is not a de Polignac number, because 31355113 - 2⁹ = 31354601 is a prime.

It is a super-2 number, since 2×31355113² = 1966286222485538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31355143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105070 + ... + 105367.

It is an arithmetic number, because the mean of its divisors is an integer number (7891425).

Almost surely, 2^31355113 is an apocalyptic number.

It is an amenable number.

31355113 is a deficient number, since it is larger than the sum of its proper divisors (210587).

31355113 is a wasteful number, since it uses less digits than its factorization.

31355113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210586.

The product of its digits is 675, while the sum is 22.

The square root of 31355113 is about 5599.5636437137. The cubic root of 31355113 is about 315.3330248000. Note that the first 3 decimals are identical.

The spelling of 31355113 in words is "thirty-one million, three hundred fifty-five thousand, one hundred thirteen".