4401532421 has 12 divisors (see below), whose sum is σ = 5210207436. Its totient is φ = 3693592320.

The previous prime is 4401532403. The next prime is 4401532433. The reversal of 4401532421 is 1242351044.

It can be written as a sum of positive squares in 2 ways, for example, as 2004352900 + 2397179521 = 44770^2 + 48961^2 .

It is not a de Polignac number, because 4401532421 - 2⁶ = 4401532357 is a prime.

It is a super-2 number, since 2×4401532421² = 38746975306228242482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4401532451) 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, 1397516 + ... + 1400661.

It is an arithmetic number, because the mean of its divisors is an integer number (434183953).

Almost surely, 2^4401532421 is an apocalyptic number.

It is an amenable number.

4401532421 is a deficient number, since it is larger than the sum of its proper divisors (808675015).

4401532421 is a wasteful number, since it uses less digits than its factorization.

4401532421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798212 (or 2798201 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 4401532421 is about 66344.0458594439. The cubic root of 4401532421 is about 1638.8327532300.

Adding to 4401532421 its reverse (1242351044), we get a palindrome (5643883465).

The spelling of 4401532421 in words is "four billion, four hundred one million, five hundred thirty-two thousand, four hundred twenty-one".