2025021566 has 4 divisors (see below), whose sum is σ = 3037532352. Its totient is φ = 1012510782.

The previous prime is 2025021563. The next prime is 2025021569. The reversal of 2025021566 is 6651205202.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2025021563) and next prime (2025021569).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2025021563) 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, 506255390 + ... + 506255393.

It is an arithmetic number, because the mean of its divisors is an integer number (759383088).

Almost surely, 2^2025021566 is an apocalyptic number.

2025021566 is a deficient number, since it is larger than the sum of its proper divisors (1012510786).

2025021566 is a wasteful number, since it uses less digits than its factorization.

2025021566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012510785.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2025021566 is about 45000.2396215842. The cubic root of 2025021566 is about 1265.1534891636.

Adding to 2025021566 its reverse (6651205202), we get a palindrome (8676226768).

The spelling of 2025021566 in words is "two billion, twenty-five million, twenty-one thousand, five hundred sixty-six".