213234043131 has 80 divisors (see below), whose sum is σ = 335743752960. Its totient is φ = 134683819200.

The previous prime is 213234043129. The next prime is 213234043133. The reversal of 213234043131 is 131340432312.

It is a happy number.

213234043131 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 340 + 4 + 313 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (213234043129) and next prime (213234043133).

It is not a de Polignac number, because 213234043131 - 2¹ = 213234043129 is a prime.

It is a super-2 number, since 2×213234043131² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 213234043095 and 213234043104.

It is not an unprimeable number, because it can be changed into a prime (213234043133) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 29436396 + ... + 29443638.

It is an arithmetic number, because the mean of its divisors is an integer number (4196796912).

Almost surely, 2^213234043131 is an apocalyptic number.

213234043131 is a deficient number, since it is larger than the sum of its proper divisors (122509709829).

213234043131 is a wasteful number, since it uses less digits than its factorization.

213234043131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7518 (or 7509 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 213234043131 its reverse (131340432312), we get a palindrome (344574475443).

The spelling of 213234043131 in words is "two hundred thirteen billion, two hundred thirty-four million, forty-three thousand, one hundred thirty-one".