4021525541 has 16 divisors (see below), whose sum is σ = 4624776000. Its totient is φ = 3458448000.

The previous prime is 4021525493. The next prime is 4021525553. The reversal of 4021525541 is 1455251204.

It is a cyclic number.

It is not a de Polignac number, because 4021525541 - 2⁶ = 4021525477 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 (4021525591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132785 + ... + 160233.

It is an arithmetic number, because the mean of its divisors is an integer number (289048500).

Almost surely, 2^4021525541 is an apocalyptic number.

It is an amenable number.

4021525541 is a deficient number, since it is larger than the sum of its proper divisors (603250459).

4021525541 is a wasteful number, since it uses less digits than its factorization.

4021525541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28180.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 4021525541 is about 63415.4992174626. The cubic root of 4021525541 is about 1590.2434316048.

Adding to 4021525541 its reverse (1455251204), we get a palindrome (5476776745).

It can be divided in two parts, 40215 and 25541, that added together give a palindrome (65756).

The spelling of 4021525541 in words is "four billion, twenty-one million, five hundred twenty-five thousand, five hundred forty-one".