16161213 has 4 divisors (see below), whose sum is σ = 21548288. Its totient is φ = 10774140.

The previous prime is 16161209. The next prime is 16161253. The reversal of 16161213 is 31216161.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31216161 = 3 ⋅10405387.

It is not a de Polignac number, because 16161213 - 2² = 16161209 is a prime.

It is a super-2 number, since 2×16161213² = 522369611262738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16161213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161253) 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, 2693533 + ... + 2693538.

It is an arithmetic number, because the mean of its divisors is an integer number (5387072).

Almost surely, 2^16161213 is an apocalyptic number.

It is an amenable number.

16161213 is a deficient number, since it is larger than the sum of its proper divisors (5387075).

16161213 is an equidigital number, since it uses as much as digits as its factorization.

16161213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5387074.

The product of its digits is 216, while the sum is 21.

The square root of 16161213 is about 4020.1011181312. The cubic root of 16161213 is about 252.8276985637.

Adding to 16161213 its reverse (31216161), we get a palindrome (47377374).

The spelling of 16161213 in words is "sixteen million, one hundred sixty-one thousand, two hundred thirteen".