2113213031 has 4 divisors (see below), whose sum is σ = 2144753592. Its totient is φ = 2081672472.

The previous prime is 2113213009. The next prime is 2113213043. The reversal of 2113213031 is 1303123112.

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

It is a cyclic number.

It is not a de Polignac number, because 2113213031 - 2¹⁴ = 2113196647 is a prime.

It is a super-2 number, since 2×2113213031² = 8931338628776413922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113213051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15770180 + ... + 15770313.

It is an arithmetic number, because the mean of its divisors is an integer number (536188398).

Almost surely, 2^2113213031 is an apocalyptic number.

2113213031 is a deficient number, since it is larger than the sum of its proper divisors (31540561).

2113213031 is an equidigital number, since it uses as much as digits as its factorization.

2113213031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31540560.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2113213031 is about 45969.6968773996. The cubic root of 2113213031 is about 1283.2593187351.

Adding to 2113213031 its reverse (1303123112), we get a palindrome (3416336143).

The spelling of 2113213031 in words is "two billion, one hundred thirteen million, two hundred thirteen thousand, thirty-one".