3215403400 has 96 divisors (see below), whose sum is σ = 8254159200. Its totient is φ = 1155084800.

The previous prime is 3215403397. The next prime is 3215403403. The reversal of 3215403400 is 43045123.

It is an interprime number because it is at equal distance from previous prime (3215403397) and next prime (3215403403).

It is a super-3 number, since 3×3215403400³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (3215403403) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 173796 + ... + 191404.

It is an arithmetic number, because the mean of its divisors is an integer number (85980825).

Almost surely, 2^3215403400 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 3215403400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4127079600).

3215403400 is an abundant number, since it is smaller than the sum of its proper divisors (5038755800).

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

3215403400 is a wasteful number, since it uses less digits than its factorization.

3215403400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17719 (or 17710 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 3215403400 is about 56704.5271561275. The cubic root of 3215403400 is about 1475.9732578885.

Adding to 3215403400 its reverse (43045123), we get a palindrome (3258448523).

The spelling of 3215403400 in words is "three billion, two hundred fifteen million, four hundred three thousand, four hundred".