213204240213031 has 4 divisors (see below), whose sum is σ = 213240641830672. Its totient is φ = 213167838595392.

The previous prime is 213204240212917. The next prime is 213204240213137. The reversal of 213204240213031 is 130312042402312.

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 213204240213031 - 2³³ = 213195650278439 is a prime.

It is a super-2 number, since 2×213204240213031² (a number of 29 digits) 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 (213204240219031) 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, 18200800035 + ... + 18200811748.

It is an arithmetic number, because the mean of its divisors is an integer number (53310160457668).

Almost surely, 2^{213204240213031} is an apocalyptic number.

213204240213031 is a deficient number, since it is larger than the sum of its proper divisors (36401617641).

213204240213031 is an equidigital number, since it uses as much as digits as its factorization.

213204240213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36401617640.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 213204240213031 its reverse (130312042402312), we get a palindrome (343516282615343).

The spelling of 213204240213031 in words is "two hundred thirteen trillion, two hundred four billion, two hundred forty million, two hundred thirteen thousand, thirty-one".