213623513 has 4 divisors (see below), whose sum is σ = 226189620. Its totient is φ = 201057408.

The previous prime is 213623497. The next prime is 213623521. The reversal of 213623513 is 315326312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 115949824 + 97673689 = 10768^2 + 9883^2 .

It is a cyclic number.

It is not a de Polignac number, because 213623513 - 2⁴ = 213623497 is a prime.

It is a super-2 number, since 2×213623513² = 91270010612922338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213623713) 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, 6283028 + ... + 6283061.

It is an arithmetic number, because the mean of its divisors is an integer number (56547405).

Almost surely, 2^213623513 is an apocalyptic number.

It is an amenable number.

213623513 is a deficient number, since it is larger than the sum of its proper divisors (12566107).

213623513 is a wasteful number, since it uses less digits than its factorization.

213623513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12566106.

The product of its digits is 3240, while the sum is 26.

The square root of 213623513 is about 14615.8651129517. The cubic root of 213623513 is about 597.7914294089.

Adding to 213623513 its reverse (315326312), we get a palindrome (528949825).

The spelling of 213623513 in words is "two hundred thirteen million, six hundred twenty-three thousand, five hundred thirteen".