213204532531 has 8 divisors (see below), whose sum is σ = 222556439504. Its totient is φ = 204041553120.

The previous prime is 213204532511. The next prime is 213204532561. The reversal of 213204532531 is 135235402312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213204532531 is a prime.

It is a super-2 number, since 2×213204532531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213204532493 and 213204532502.

It is not an unprimeable number, because it can be changed into a prime (213204532501) 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, 47229585 + ... + 47234098.

It is an arithmetic number, because the mean of its divisors is an integer number (27819554938).

Almost surely, 2^213204532531 is an apocalyptic number.

213204532531 is a deficient number, since it is larger than the sum of its proper divisors (9351906973).

213204532531 is an equidigital number, since it uses as much as digits as its factorization.

213204532531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94463781.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 213204532531 its reverse (135235402312), we get a palindrome (348439934843).

The spelling of 213204532531 in words is "two hundred thirteen billion, two hundred four million, five hundred thirty-two thousand, five hundred thirty-one".