4540051521 has 12 divisors (see below), whose sum is σ = 6655731472. Its totient is φ = 2981525976.

The previous prime is 4540051507. The next prime is 4540051561. The reversal of 4540051521 is 1251500454.

It is not a de Polignac number, because 4540051521 - 2⁶ = 4540051457 is a prime.

It is a super-2 number, since 2×4540051521² = 41224135626668826882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4540051561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3763951 + ... + 3765156.

Almost surely, 2^4540051521 is an apocalyptic number.

It is an amenable number.

4540051521 is a deficient number, since it is larger than the sum of its proper divisors (2115679951).

4540051521 is a wasteful number, since it uses less digits than its factorization.

4540051521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7529180 (or 7529177 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 4540051521 is about 67379.9044300302. The cubic root of 4540051521 is about 1655.8472092194.

Adding to 4540051521 its reverse (1251500454), we get a palindrome (5791551975).

The spelling of 4540051521 in words is "four billion, five hundred forty million, fifty-one thousand, five hundred twenty-one".