216373469 has 4 divisors (see below), whose sum is σ = 233017596. Its totient is φ = 199729344.

The previous prime is 216373453. The next prime is 216373481. The reversal of 216373469 is 964373612.

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 80371225 + 136002244 = 8965^2 + 11662^2 .

It is a cyclic number.

It is not a de Polignac number, because 216373469 - 2⁴ = 216373453 is a prime.

It is a super-2 number, since 2×216373469² = 93634956174187922, 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 (216373429) 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, 8322044 + ... + 8322069.

It is an arithmetic number, because the mean of its divisors is an integer number (58254399).

Almost surely, 2^216373469 is an apocalyptic number.

It is an amenable number.

216373469 is a deficient number, since it is larger than the sum of its proper divisors (16644127).

216373469 is a wasteful number, since it uses less digits than its factorization.

216373469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16644126.

The product of its digits is 163296, while the sum is 41.

The square root of 216373469 is about 14709.6386427403. The cubic root of 216373469 is about 600.3456055194.

The spelling of 216373469 in words is "two hundred sixteen million, three hundred seventy-three thousand, four hundred sixty-nine".