990215 has 4 divisors (see below), whose sum is σ = 1188264. Its totient is φ = 792168.

The previous prime is 990211. The next prime is 990239. The reversal of 990215 is 512099.

It is a happy number.

990215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 990215 - 2² = 990211 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990211) 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, 99017 + ... + 99026.

It is an arithmetic number, because the mean of its divisors is an integer number (297066).

2⁹⁹⁰²¹⁵ is an apocalyptic number.

990215 is a deficient number, since it is larger than the sum of its proper divisors (198049).

990215 is a wasteful number, since it uses less digits than its factorization.

990215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198048.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 990215 is about 995.0954728065. The cubic root of 990215 is about 99.6727636652.

The spelling of 990215 in words is "nine hundred ninety thousand, two hundred fifteen".