31013011 has 4 divisors (see below), whose sum is σ = 31025632. Its totient is φ = 31000392.

The previous prime is 31012973. The next prime is 31013023. The reversal of 31013011 is 11031013.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31013011 is a prime.

It is a super-2 number, since 2×31013011² = 1923613702572242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31013041) 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 in 3 ways as a sum of consecutive naturals, for example, 1296 + ... + 7981.

It is an arithmetic number, because the mean of its divisors is an integer number (7756408).

Almost surely, 2^31013011 is an apocalyptic number.

31013011 is a deficient number, since it is larger than the sum of its proper divisors (12621).

31013011 is an equidigital number, since it uses as much as digits as its factorization.

31013011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12620.

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 31013011 is about 5568.9326625485. The cubic root of 31013011 is about 314.1820080207.

Adding to 31013011 its reverse (11031013), we get a palindrome (42044024).

The spelling of 31013011 in words is "thirty-one million, thirteen thousand, eleven".