4015821252 has 48 divisors (see below), whose sum is σ = 9828443520. Its totient is φ = 1273755648.

The previous prime is 4015821179. The next prime is 4015821269. The reversal of 4015821252 is 2521285104.

It is a super-2 number, since 2×4015821252² = 32253640656029695008, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15574 + ... + 90962.

It is an arithmetic number, because the mean of its divisors is an integer number (204759240).

Almost surely, 2^4015821252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4015821252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4914221760).

4015821252 is an abundant number, since it is smaller than the sum of its proper divisors (5812622268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4015821252 is a wasteful number, since it uses less digits than its factorization.

4015821252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75612 (or 75610 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 4015821252 is about 63370.5077461117. The cubic root of 4015821252 is about 1589.4911880105.

The spelling of 4015821252 in words is "four billion, fifteen million, eight hundred twenty-one thousand, two hundred fifty-two".