2151505011 has 4 divisors (see below), whose sum is σ = 2868673352. Its totient is φ = 1434336672.

The previous prime is 2151505003. The next prime is 2151505061. The reversal of 2151505011 is 1105051512.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2151505011 - 2³ = 2151505003 is a prime.

It is a super-2 number, since 2×2151505011² = 9257947624716220242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151505061) 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, 358584166 + ... + 358584171.

It is an arithmetic number, because the mean of its divisors is an integer number (717168338).

Almost surely, 2^2151505011 is an apocalyptic number.

2151505011 is a deficient number, since it is larger than the sum of its proper divisors (717168341).

2151505011 is an equidigital number, since it uses as much as digits as its factorization.

2151505011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717168340.

The product of its (nonzero) digits is 250, while the sum is 21.

The square root of 2151505011 is about 46384.3185893681. The cubic root of 2151505011 is about 1290.9639673042.

Adding to 2151505011 its reverse (1105051512), we get a palindrome (3256556523).

The spelling of 2151505011 in words is "two billion, one hundred fifty-one million, five hundred five thousand, eleven".