213443111031 has 16 divisors (see below), whose sum is σ = 299579385600. Its totient is φ = 134801627328.

The previous prime is 213443111027. The next prime is 213443111041. The reversal of 213443111031 is 130111344312.

It is a happy number.

It is not a de Polignac number, because 213443111031 - 2² = 213443111027 is a prime.

It is a super-2 number, since 2×213443111031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213443110992 and 213443111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213443111041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2667910 + ... + 2746748.

It is an arithmetic number, because the mean of its divisors is an integer number (18723711600).

Almost surely, 2^213443111031 is an apocalyptic number.

213443111031 is a deficient number, since it is larger than the sum of its proper divisors (86136274569).

213443111031 is a wasteful number, since it uses less digits than its factorization.

213443111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126358.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 213443111031 its reverse (130111344312), we get a palindrome (343554455343).

The spelling of 213443111031 in words is "two hundred thirteen billion, four hundred forty-three million, one hundred eleven thousand, thirty-one".