3215222520 has 32 divisors (see below), whose sum is σ = 9645667920. Its totient is φ = 857392640.

The previous prime is 3215222477. The next prime is 3215222539. The reversal of 3215222520 is 252225123.

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

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13396641 + ... + 13396880.

Almost surely, 2^3215222520 is an apocalyptic number.

3215222520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3215222520 is an abundant number, since it is smaller than the sum of its proper divisors (6430445400).

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

3215222520 is a wasteful number, since it uses less digits than its factorization.

3215222520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26793535 (or 26793531 counting only the distinct ones).

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

The square root of 3215222520 is about 56702.9321993140. The cubic root of 3215222520 is about 1475.9455807963.

Adding to 3215222520 its reverse (252225123), we get a palindrome (3467447643).

The spelling of 3215222520 in words is "three billion, two hundred fifteen million, two hundred twenty-two thousand, five hundred twenty".