2251130987 has 8 divisors (see below), whose sum is σ = 2575021056. Its totient is φ = 1927815912.

The previous prime is 2251130977. The next prime is 2251130989. The reversal of 2251130987 is 7890311522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2251130987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2251130987.

It is not an unprimeable number, because it can be changed into a prime (2251130989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135323 + ... + 151044.

It is an arithmetic number, because the mean of its divisors is an integer number (321877632).

Almost surely, 2^2251130987 is an apocalyptic number.

2251130987 is a deficient number, since it is larger than the sum of its proper divisors (323890069).

2251130987 is a wasteful number, since it uses less digits than its factorization.

2251130987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287497.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 2251130987 is about 47446.0850545121. The cubic root of 2251130987 is about 1310.5902176935.

The spelling of 2251130987 in words is "two billion, two hundred fifty-one million, one hundred thirty thousand, nine hundred eighty-seven".