2521266541 has 4 divisors (see below), whose sum is σ = 2653964800. Its totient is φ = 2388568284.

The previous prime is 2521266533. The next prime is 2521266563. The reversal of 2521266541 is 1456621252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2521266541 - 2³ = 2521266533 is a prime.

It is a super-2 number, since 2×2521266541² = 12713569941532209362, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2521266497 and 2521266506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521266521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66349101 + ... + 66349138.

It is an arithmetic number, because the mean of its divisors is an integer number (663491200).

Almost surely, 2^2521266541 is an apocalyptic number.

It is an amenable number.

2521266541 is a deficient number, since it is larger than the sum of its proper divisors (132698259).

2521266541 is a wasteful number, since it uses less digits than its factorization.

2521266541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132698258.

The product of its digits is 28800, while the sum is 34.

The square root of 2521266541 is about 50212.2150576929. The cubic root of 2521266541 is about 1361.0463654738.

Adding to 2521266541 its reverse (1456621252), we get a palindrome (3977887793).

The spelling of 2521266541 in words is "two billion, five hundred twenty-one million, two hundred sixty-six thousand, five hundred forty-one".