213325531 has 4 divisors (see below), whose sum is σ = 213434352. Its totient is φ = 213216712.

The previous prime is 213325523. The next prime is 213325547. The reversal of 213325531 is 135523312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213325531 - 2³ = 213325523 is a prime.

It is a super-2 number, since 2×213325531² = 91015564352863922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213325496 and 213325505.

It is not an unprimeable number, because it can be changed into a prime (213325561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51415 + ... + 55408.

It is an arithmetic number, because the mean of its divisors is an integer number (53358588).

Almost surely, 2^213325531 is an apocalyptic number.

213325531 is a deficient number, since it is larger than the sum of its proper divisors (108821).

213325531 is a wasteful number, since it uses less digits than its factorization.

213325531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108820.

The product of its digits is 2700, while the sum is 25.

The square root of 213325531 is about 14605.6677697393. The cubic root of 213325531 is about 597.5133483243.

Adding to 213325531 its reverse (135523312), we get a palindrome (348848843).

The spelling of 213325531 in words is "two hundred thirteen million, three hundred twenty-five thousand, five hundred thirty-one".