213116653 has 4 divisors (see below), whose sum is σ = 216118368. Its totient is φ = 210114940.

The previous prime is 213116639. The next prime is 213116699. The reversal of 213116653 is 356611312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213116653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213116623) 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, 1500751 + ... + 1500892.

It is an arithmetic number, because the mean of its divisors is an integer number (54029592).

Almost surely, 2^213116653 is an apocalyptic number.

It is an amenable number.

213116653 is a deficient number, since it is larger than the sum of its proper divisors (3001715).

213116653 is an equidigital number, since it uses as much as digits as its factorization.

213116653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001714.

The product of its digits is 3240, while the sum is 28.

The square root of 213116653 is about 14598.5154382218. The cubic root of 213116653 is about 597.3182659544.

Adding to 213116653 its reverse (356611312), we get a palindrome (569727965).

The spelling of 213116653 in words is "two hundred thirteen million, one hundred sixteen thousand, six hundred fifty-three".