1630215 has 24 divisors (see below), whose sum is σ = 2993328. Its totient is φ = 817920.

The previous prime is 1630199. The next prime is 1630243. The reversal of 1630215 is 5120361.

1630215 = 569² + 570² + ... + 573².

It is not a de Polignac number, because 1630215 - 2⁴ = 1630199 is a prime.

It is an Ulam number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 301 + ... + 1830.

It is an arithmetic number, because the mean of its divisors is an integer number (124722).

2^1630215 is an apocalyptic number.

1630215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1630215 is a deficient number, since it is larger than the sum of its proper divisors (1363113).

1630215 is a wasteful number, since it uses less digits than its factorization.

1630215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159 (or 2156 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1630215 is about 1276.7987312024. The cubic root of 1630215 is about 117.6923663482.

Adding to 1630215 its reverse (5120361), we get a palindrome (6750576).

The spelling of 1630215 in words is "one million, six hundred thirty thousand, two hundred fifteen".