213130233 has 6 divisors (see below), whose sum is σ = 307854794. Its totient is φ = 142086816.

The previous prime is 213130219. The next prime is 213130237. The reversal of 213130233 is 332031312.

It can be written as a sum of positive squares in only one way, i.e., 152102889 + 61027344 = 12333^2 + 7812^2 .

It is not a de Polignac number, because 213130233 - 2⁸ = 213129977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213130237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11840560 + ... + 11840577.

Almost surely, 2^213130233 is an apocalyptic number.

It is an amenable number.

213130233 is a deficient number, since it is larger than the sum of its proper divisors (94724561).

213130233 is a wasteful number, since it uses less digits than its factorization.

213130233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23681143 (or 23681140 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 213130233 is about 14598.9805465998. The cubic root of 213130233 is about 597.3309529182.

Adding to 213130233 its reverse (332031312), we get a palindrome (545161545).

The spelling of 213130233 in words is "two hundred thirteen million, one hundred thirty thousand, two hundred thirty-three".