213235487 has 4 divisors (see below), whose sum is σ = 213447000. Its totient is φ = 213023976.

The previous prime is 213235481. The next prime is 213235489. The reversal of 213235487 is 784532312.

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 213235487 - 2²⁶ = 146126623 is a prime.

It is a super-2 number, since 2×213235487² = 90938745832254338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213235481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104237 + ... + 106262.

It is an arithmetic number, because the mean of its divisors is an integer number (53361750).

Almost surely, 2^213235487 is an apocalyptic number.

213235487 is a deficient number, since it is larger than the sum of its proper divisors (211513).

213235487 is a wasteful number, since it uses less digits than its factorization.

213235487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211512.

The product of its digits is 40320, while the sum is 35.

The square root of 213235487 is about 14602.5849423998. The cubic root of 213235487 is about 597.4292670247.

Adding to 213235487 its reverse (784532312), we get a palindrome (997767799).

The spelling of 213235487 in words is "two hundred thirteen million, two hundred thirty-five thousand, four hundred eighty-seven".