1001231215 has 16 divisors (see below), whose sum is σ = 1225559808. Its totient is φ = 784965376.

The previous prime is 1001231213. The next prime is 1001231237. The reversal of 1001231215 is 5121321001.

1001231215 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1001231215 - 2¹ = 1001231213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001231213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314562 + ... + 317728.

It is an arithmetic number, because the mean of its divisors is an integer number (76597488).

Almost surely, 2^1001231215 is an apocalyptic number.

1001231215 is a deficient number, since it is larger than the sum of its proper divisors (224328593).

1001231215 is a wasteful number, since it uses less digits than its factorization.

1001231215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4418.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1001231215 is about 31642.2378317337. The cubic root of 1001231215 is about 1000.4102366829.

Adding to 1001231215 its reverse (5121321001), we get a palindrome (6122552216).

The spelling of 1001231215 in words is "one billion, one million, two hundred thirty-one thousand, two hundred fifteen".