213131023 has 8 divisors (see below), whose sum is σ = 257906592. Its totient is φ = 171937536.

The previous prime is 213131003. The next prime is 213131027. The reversal of 213131023 is 320131312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213131023 - 2⁵ = 213130991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213130988 and 213131006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213131027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895390 + ... + 895627.

It is an arithmetic number, because the mean of its divisors is an integer number (32238324).

Almost surely, 2^213131023 is an apocalyptic number.

213131023 is a deficient number, since it is larger than the sum of its proper divisors (44775569).

213131023 is a wasteful number, since it uses less digits than its factorization.

213131023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791041.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 213131023 is about 14599.0076032585. The cubic root of 213131023 is about 597.3316909503.

Adding to 213131023 its reverse (320131312), we get a palindrome (533262335).

The spelling of 213131023 in words is "two hundred thirteen million, one hundred thirty-one thousand, twenty-three".