213231004131 has 32 divisors (see below), whose sum is σ = 304813212480. Its totient is φ = 132115410944.

The previous prime is 213231004127. The next prime is 213231004141. The reversal of 213231004131 is 131400132312.

It is a cyclic number.

It is not a de Polignac number, because 213231004131 - 2² = 213231004127 is a prime.

It is a super-2 number, since 2×213231004131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213231004098 and 213231004107.

It is not an unprimeable number, because it can be changed into a prime (213231004121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3478261 + ... + 3539033.

It is an arithmetic number, because the mean of its divisors is an integer number (9525412890).

Almost surely, 2^213231004131 is an apocalyptic number.

213231004131 is a deficient number, since it is larger than the sum of its proper divisors (91582208349).

213231004131 is a wasteful number, since it uses less digits than its factorization.

213231004131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61655.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213231004131 its reverse (131400132312), we get a palindrome (344631136443).

The spelling of 213231004131 in words is "two hundred thirteen billion, two hundred thirty-one million, four thousand, one hundred thirty-one".