3221255400 has 96 divisors (see below), whose sum is σ = 10893722400. Its totient is φ = 780908800.

The previous prime is 3221255399. The next prime is 3221255407. The reversal of 3221255400 is 45521223.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (3221255407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237435 + ... + 250634.

It is an arithmetic number, because the mean of its divisors is an integer number (113476275).

Almost surely, 2^3221255400 is an apocalyptic number.

3221255400 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3221255400 is an abundant number, since it is smaller than the sum of its proper divisors (7672467000).

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

3221255400 is a wasteful number, since it uses less digits than its factorization.

3221255400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488099 (or 488090 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 3221255400 is about 56756.1045174878. The cubic root of 3221255400 is about 1476.8681337650.

Adding to 3221255400 its reverse (45521223), we get a palindrome (3266776623).

The spelling of 3221255400 in words is "three billion, two hundred twenty-one million, two hundred fifty-five thousand, four hundred".