2025542021 has 2 divisors, whose sum is σ = 2025542022. Its totient is φ = 2025542020.

The previous prime is 2025542017. The next prime is 2025542041. The reversal of 2025542021 is 1202455202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1186802500 + 838739521 = 34450^2 + 28961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2025542021 - 2² = 2025542017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2025542041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1012771010 + 1012771011.

It is an arithmetic number, because the mean of its divisors is an integer number (1012771011).

Almost surely, 2^2025542021 is an apocalyptic number.

It is an amenable number.

2025542021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2025542021 is an equidigital number, since it uses as much as digits as its factorization.

2025542021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 2025542021 is about 45006.0220526098. The cubic root of 2025542021 is about 1265.2618664549.

Adding to 2025542021 its reverse (1202455202), we get a palindrome (3227997223).

The spelling of 2025542021 in words is "two billion, twenty-five million, five hundred forty-two thousand, twenty-one".