2151346987 has 4 divisors (see below), whose sum is σ = 2151520096. Its totient is φ = 2151173880.

The previous prime is 2151346973. The next prime is 2151347041. The reversal of 2151346987 is 7896431512.

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 2151346987 - 2³¹ = 3863339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151346487) 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, 66339 + ... + 93292.

It is an arithmetic number, because the mean of its divisors is an integer number (537880024).

Almost surely, 2^2151346987 is an apocalyptic number.

2151346987 is a deficient number, since it is larger than the sum of its proper divisors (173109).

2151346987 is a wasteful number, since it uses less digits than its factorization.

2151346987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173108.

The product of its digits is 362880, while the sum is 46.

The square root of 2151346987 is about 46382.6151375707. The cubic root of 2151346987 is about 1290.9323602379.

The spelling of 2151346987 in words is "two billion, one hundred fifty-one million, three hundred forty-six thousand, nine hundred eighty-seven".