13215890 has 8 divisors (see below), whose sum is σ = 23788620. Its totient is φ = 5286352.

The previous prime is 13215871. The next prime is 13215893. The reversal of 13215890 is 9851231.

It can be written as a sum of positive squares in 2 ways, for example, as 12439729 + 776161 = 3527^2 + 881^2 .

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

It is not an unprimeable number, because it can be changed into a prime (13215893) 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, 660785 + ... + 660804.

Almost surely, 2^13215890 is an apocalyptic number.

13215890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13215890 is a deficient number, since it is larger than the sum of its proper divisors (10572730).

13215890 is a wasteful number, since it uses less digits than its factorization.

13215890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321596.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 13215890 is about 3635.3665564837. The cubic root of 13215890 is about 236.4279437270.

The spelling of 13215890 in words is "thirteen million, two hundred fifteen thousand, eight hundred ninety".