2251009987 has 2 divisors, whose sum is σ = 2251009988. Its totient is φ = 2251009986.

The previous prime is 2251009961. The next prime is 2251009997. The reversal of 2251009987 is 7899001522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2251009987 - 2¹¹ = 2251007939 is a prime.

It is not a weakly prime, because it can be changed into another prime (2251009997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125504993 + 1125504994.

It is an arithmetic number, because the mean of its divisors is an integer number (1125504994).

Almost surely, 2^2251009987 is an apocalyptic number.

2251009987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251009987 is an equidigital number, since it uses as much as digits as its factorization.

2251009987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 2251009987 is about 47444.8099058264. The cubic root of 2251009987 is about 1310.5667355330.

The spelling of 2251009987 in words is "two billion, two hundred fifty-one million, nine thousand, nine hundred eighty-seven".