3572256021 has 16 divisors (see below), whose sum is σ = 4854928320. Its totient is φ = 2335582080.

The previous prime is 3572256013. The next prime is 3572256031. The reversal of 3572256021 is 1206522753.

3572256021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3572256021 - 2³ = 3572256013 is a prime.

It is a super-2 number, since 2×3572256021² = 25522026159141504882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3572256031) 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, 703590 + ... + 708648.

It is an arithmetic number, because the mean of its divisors is an integer number (303433020).

Almost surely, 2^3572256021 is an apocalyptic number.

It is an amenable number.

3572256021 is a deficient number, since it is larger than the sum of its proper divisors (1282672299).

3572256021 is a wasteful number, since it uses less digits than its factorization.

3572256021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9556.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 3572256021 is about 59768.3530055831. The cubic root of 3572256021 is about 1528.6715826398.

Adding to 3572256021 its reverse (1206522753), we get a palindrome (4778778774).

The spelling of 3572256021 in words is "three billion, five hundred seventy-two million, two hundred fifty-six thousand, twenty-one".