2151515011 has 4 divisors (see below), whose sum is σ = 2151704800. Its totient is φ = 2151325224.

The previous prime is 2151514991. The next prime is 2151515039. The reversal of 2151515011 is 1105151512.

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 2151515011 - 2⁹ = 2151514499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151515071) 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, 76731 + ... + 100948.

It is an arithmetic number, because the mean of its divisors is an integer number (537926200).

Almost surely, 2^2151515011 is an apocalyptic number.

2151515011 is a deficient number, since it is larger than the sum of its proper divisors (189789).

2151515011 is a wasteful number, since it uses less digits than its factorization.

2151515011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189788.

The product of its (nonzero) digits is 250, while the sum is 22.

The square root of 2151515011 is about 46384.4263842941. The cubic root of 2151515011 is about 1290.9659673955.

Adding to 2151515011 its reverse (1105151512), we get a palindrome (3256666523).

The spelling of 2151515011 in words is "two billion, one hundred fifty-one million, five hundred fifteen thousand, eleven".