4040032521 has 16 divisors (see below), whose sum is σ = 6173026304. Its totient is φ = 2302295184.

The previous prime is 4040032511. The next prime is 4040032589. The reversal of 4040032521 is 1252300404.

It is not a de Polignac number, because 4040032521 - 2¹⁴ = 4040016137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4040032511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254395 + ... + 269808.

It is an arithmetic number, because the mean of its divisors is an integer number (385814144).

Almost surely, 2^4040032521 is an apocalyptic number.

It is an amenable number.

4040032521 is a deficient number, since it is larger than the sum of its proper divisors (2132993783).

4040032521 is a wasteful number, since it uses less digits than its factorization.

4040032521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524580.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 4040032521 is about 63561.2501529037. The cubic root of 4040032521 is about 1592.6791218925.

Adding to 4040032521 its reverse (1252300404), we get a palindrome (5292332925).

The spelling of 4040032521 in words is "four billion, forty million, thirty-two thousand, five hundred twenty-one".