3522345021 has 72 divisors (see below), whose sum is σ = 5791467864. Its totient is φ = 2128913280.

The previous prime is 3522345011. The next prime is 3522345031. The reversal of 3522345021 is 1205432253.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3522345011) and next prime (3522345031).

It can be written as a sum of positive squares in 4 ways, for example, as 214944921 + 3307400100 = 14661^2 + 57510^2 .

It is not a de Polignac number, because 3522345021 - 2⁵ = 3522344989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3522345011) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5202535 + ... + 5203211.

Almost surely, 2^3522345021 is an apocalyptic number.

It is an amenable number.

3522345021 is a deficient number, since it is larger than the sum of its proper divisors (2269122843).

3522345021 is an frugal number, since it uses more digits than its factorization.

3522345021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 754 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 3522345021 is about 59349.3472668403. The cubic root of 3522345021 is about 1521.5187124760.

Adding to 3522345021 its reverse (1205432253), we get a palindrome (4727777274).

The spelling of 3522345021 in words is "three billion, five hundred twenty-two million, three hundred forty-five thousand, twenty-one".