2151235015 has 4 divisors (see below), whose sum is σ = 2581482024. Its totient is φ = 1720988008.

The previous prime is 2151235001. The next prime is 2151235039. The reversal of 2151235015 is 5105321512.

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 2151235015 - 2⁵ = 2151234983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215123497 + ... + 215123506.

It is an arithmetic number, because the mean of its divisors is an integer number (645370506).

Almost surely, 2^2151235015 is an apocalyptic number.

2151235015 is a deficient number, since it is larger than the sum of its proper divisors (430247009).

2151235015 is an equidigital number, since it uses as much as digits as its factorization.

2151235015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430247008.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 2151235015 is about 46381.4080747879. The cubic root of 2151235015 is about 1290.9099632951.

Adding to 2151235015 its reverse (5105321512), we get a palindrome (7256556527).

The spelling of 2151235015 in words is "two billion, one hundred fifty-one million, two hundred thirty-five thousand, fifteen".