2228521987 has 2 divisors, whose sum is σ = 2228521988. Its totient is φ = 2228521986.

The previous prime is 2228521979. The next prime is 2228521991. The reversal of 2228521987 is 7891258222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2228521987 - 2³ = 2228521979 is a prime.

It is not a weakly prime, because it can be changed into another prime (2228521937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1114260993 + 1114260994.

It is an arithmetic number, because the mean of its divisors is an integer number (1114260994).

Almost surely, 2^2228521987 is an apocalyptic number.

2228521987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2228521987 is an equidigital number, since it uses as much as digits as its factorization.

2228521987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 46.

The square root of 2228521987 is about 47207.2238857571. The cubic root of 2228521987 is about 1306.1878542140.

The spelling of 2228521987 in words is "two billion, two hundred twenty-eight million, five hundred twenty-one thousand, nine hundred eighty-seven".