3220138581 has 8 divisors (see below), whose sum is σ = 4683837984. Its totient is φ = 1951599120.

The previous prime is 3220138567. The next prime is 3220138591. The reversal of 3220138581 is 1858310223.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3220138581 - 2⁶ = 3220138517 is a prime.

It is a super-2 number, since 2×3220138581² = 20738584961689387122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 97579957 = 3220138581 / (3 + 2 + 2 + 0 + 1 + 3 + 8 + 5 + 8 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220138501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48789946 + ... + 48790011.

It is an arithmetic number, because the mean of its divisors is an integer number (585479748).

Almost surely, 2^3220138581 is an apocalyptic number.

It is an amenable number.

3220138581 is a deficient number, since it is larger than the sum of its proper divisors (1463699403).

3220138581 is a wasteful number, since it uses less digits than its factorization.

3220138581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97579971.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 3220138581 is about 56746.2649079215. The cubic root of 3220138581 is about 1476.6974358186.

The spelling of 3220138581 in words is "three billion, two hundred twenty million, one hundred thirty-eight thousand, five hundred eighty-one".