816162213 has 4 divisors (see below), whose sum is σ = 1088216288. Its totient is φ = 544108140.

The previous prime is 816162187. The next prime is 816162223. The reversal of 816162213 is 312261618.

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 not a de Polignac number, because 816162213 - 2⁵ = 816162181 is a prime.

It is a super-2 number, since 2×816162213² = 1332241515858114738, 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 (816162223) 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, 136027033 + ... + 136027038.

It is an arithmetic number, because the mean of its divisors is an integer number (272054072).

Almost surely, 2^816162213 is an apocalyptic number.

It is an amenable number.

816162213 is a deficient number, since it is larger than the sum of its proper divisors (272054075).

816162213 is a wasteful number, since it uses less digits than its factorization.

816162213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272054074.

The product of its digits is 3456, while the sum is 30.

The square root of 816162213 is about 28568.5528684951. The cubic root of 816162213 is about 934.5276625210.

The spelling of 816162213 in words is "eight hundred sixteen million, one hundred sixty-two thousand, two hundred thirteen".