2001215153 has 4 divisors (see below), whose sum is σ = 2287103040. Its totient is φ = 1715327268.

The previous prime is 2001215149. The next prime is 2001215173. The reversal of 2001215153 is 3515121002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2001215153 - 2² = 2001215149 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001215173) 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, 142943933 + ... + 142943946.

It is an arithmetic number, because the mean of its divisors is an integer number (571775760).

Almost surely, 2^2001215153 is an apocalyptic number.

It is an amenable number.

2001215153 is a deficient number, since it is larger than the sum of its proper divisors (285887887).

2001215153 is an equidigital number, since it uses as much as digits as its factorization.

2001215153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285887886.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2001215153 is about 44734.9433105710. The cubic root of 2001215153 is about 1260.1761643752.

Adding to 2001215153 its reverse (3515121002), we get a palindrome (5516336155).

The spelling of 2001215153 in words is "two billion, one million, two hundred fifteen thousand, one hundred fifty-three".