3221405252 has 12 divisors (see below), whose sum is σ = 6071109996. Its totient is φ = 1486802400.

The previous prime is 3221405249. The next prime is 3221405279. The reversal of 3221405252 is 2525041223.

It can be written as a sum of positive squares in 2 ways, for example, as 316626436 + 2904778816 = 17794^2 + 53896^2 .

It is a super-2 number, since 2×3221405252² = 20754903595226367008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30974999 + ... + 30975102.

It is an arithmetic number, because the mean of its divisors is an integer number (505925833).

Almost surely, 2^3221405252 is an apocalyptic number.

It is an amenable number.

3221405252 is a deficient number, since it is larger than the sum of its proper divisors (2849704744).

3221405252 is a wasteful number, since it uses less digits than its factorization.

3221405252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61950118 (or 61950116 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 3221405252 is about 56757.4246420678. The cubic root of 3221405252 is about 1476.8910345893.

Adding to 3221405252 its reverse (2525041223), we get a palindrome (5746446475).

The spelling of 3221405252 in words is "three billion, two hundred twenty-one million, four hundred five thousand, two hundred fifty-two".