2541642221 has 8 divisors (see below), whose sum is σ = 2629394040. Its totient is φ = 2454893568.

The previous prime is 2541642197. The next prime is 2541642223. The reversal of 2541642221 is 1222461452.

It can be written as a sum of positive squares in 4 ways, for example, as 845355625 + 1696286596 = 29075^2 + 41186^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2541642221 - 2²⁶ = 2474533357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541642223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245636 + ... + 255773.

It is an arithmetic number, because the mean of its divisors is an integer number (328674255).

Almost surely, 2^2541642221 is an apocalyptic number.

It is an amenable number.

2541642221 is a deficient number, since it is larger than the sum of its proper divisors (87751819).

2541642221 is a wasteful number, since it uses less digits than its factorization.

2541642221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501583.

The product of its digits is 7680, while the sum is 29.

The square root of 2541642221 is about 50414.7024289542. The cubic root of 2541642221 is about 1364.7029764258.

The spelling of 2541642221 in words is "two billion, five hundred forty-one million, six hundred forty-two thousand, two hundred twenty-one".