2142251987 has 2 divisors, whose sum is σ = 2142251988. Its totient is φ = 2142251986.

The previous prime is 2142251977. The next prime is 2142251999. The reversal of 2142251987 is 7891522412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2142251987 - 2⁴ = 2142251971 is a prime.

It is not a weakly prime, because it can be changed into another prime (2142251977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071125993 + 1071125994.

It is an arithmetic number, because the mean of its divisors is an integer number (1071125994).

Almost surely, 2^2142251987 is an apocalyptic number.

2142251987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142251987 is an equidigital number, since it uses as much as digits as its factorization.

2142251987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 41.

The square root of 2142251987 is about 46284.4680967601. The cubic root of 2142251987 is about 1289.1106156513.

The spelling of 2142251987 in words is "two billion, one hundred forty-two million, two hundred fifty-one thousand, nine hundred eighty-seven".