2001215450 has 48 divisors (see below), whose sum is σ = 4018102200. Its totient is φ = 737157120.

The previous prime is 2001215431. The next prime is 2001215467. The reversal of 2001215450 is 545121002.

It can be written as a sum of positive squares in 12 ways, for example, as 111661489 + 1889553961 = 10567^2 + 43469^2 .

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, 288422 + ... + 295278.

Almost surely, 2^2001215450 is an apocalyptic number.

2001215450 is an abundant number, since it is smaller than the sum of its proper divisors (2016886750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001215450 is a wasteful number, since it uses less digits than its factorization.

2001215450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7331 (or 7326 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2001215450 is about 44734.9466301235. The cubic root of 2001215450 is about 1260.1762267161.

Adding to 2001215450 its reverse (545121002), we get a palindrome (2546336452).

The spelling of 2001215450 in words is "two billion, one million, two hundred fifteen thousand, four hundred fifty".