2524221989 has 2 divisors, whose sum is σ = 2524221990. Its totient is φ = 2524221988.

The previous prime is 2524221977. The next prime is 2524222037. The reversal of 2524221989 is 9891224252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1839981025 + 684240964 = 42895^2 + 26158^2 .

It is a cyclic number.

It is not a de Polignac number, because 2524221989 - 2¹² = 2524217893 is a prime.

It is a super-2 number, since 2×2524221989² = 12743393299502232242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2524221589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262110994 + 1262110995.

It is an arithmetic number, because the mean of its divisors is an integer number (1262110995).

Almost surely, 2^2524221989 is an apocalyptic number.

It is an amenable number.

2524221989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2524221989 is an equidigital number, since it uses as much as digits as its factorization.

2524221989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 2524221989 is about 50241.6360103849. The cubic root of 2524221989 is about 1361.5779674789.

The spelling of 2524221989 in words is "two billion, five hundred twenty-four million, two hundred twenty-one thousand, nine hundred eighty-nine".