3215455040 has 112 divisors (see below), whose sum is σ = 9052560000. Its totient is φ = 1064404992.

The previous prime is 3215455031. The next prime is 3215455043. The reversal of 3215455040 is 405545123.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×3215455040² = 20678302228522803200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 3215454994 and 3215455012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3215455043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40211 + ... + 89709.

Almost surely, 2^3215455040 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 3215455040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4526280000).

3215455040 is an abundant number, since it is smaller than the sum of its proper divisors (5837104960).

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

3215455040 is a wasteful number, since it uses less digits than its factorization.

3215455040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49552 (or 49542 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 3215455040 is about 56704.9824971316. The cubic root of 3215455040 is about 1475.9811593182.

The spelling of 3215455040 in words is "three billion, two hundred fifteen million, four hundred fifty-five thousand, forty".