13215669 has 8 divisors (see below), whose sum is σ = 17640000. Its totient is φ = 8800896.

The previous prime is 13215661. The next prime is 13215691. The reversal of 13215669 is 96651231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13215669 - 2³ = 13215661 is a prime.

It is a super-2 number, since 2×13215669² = 349307814235122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13215661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1984 + ... + 5510.

It is an arithmetic number, because the mean of its divisors is an integer number (2205000).

Almost surely, 2^13215669 is an apocalyptic number.

It is an amenable number.

13215669 is a deficient number, since it is larger than the sum of its proper divisors (4424331).

13215669 is a wasteful number, since it uses less digits than its factorization.

13215669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4779.

The product of its digits is 9720, while the sum is 33.

The square root of 13215669 is about 3635.3361605222. The cubic root of 13215669 is about 236.4266258471.

The spelling of 13215669 in words is "thirteen million, two hundred fifteen thousand, six hundred sixty-nine".