3781221570 has 48 divisors (see below), whose sum is σ = 11235631680. Its totient is φ = 864279072.

The previous prime is 3781221557. The next prime is 3781221589. The reversal of 3781221570 is 751221873.

3781221570 is a `hidden beast` number, since 3 + 7 + 81 + 2 + 2 + 1 + 570 = 666.

It is a super-2 number, since 2×3781221570² = 28595273122866529800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3000340 + ... + 3001599.

It is an arithmetic number, because the mean of its divisors is an integer number (234075660).

Almost surely, 2^3781221570 is an apocalyptic number.

3781221570 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3781221570 is an abundant number, since it is smaller than the sum of its proper divisors (7454410110).

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

3781221570 is a wasteful number, since it uses less digits than its factorization.

3781221570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6001959 (or 6001956 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 3781221570 is about 61491.6382120366. The cubic root of 3781221570 is about 1557.9160165834.

The spelling of 3781221570 in words is "three billion, seven hundred eighty-one million, two hundred twenty-one thousand, five hundred seventy".