39220581 has 16 divisors (see below), whose sum is σ = 55617408. Its totient is φ = 24499200.

The previous prime is 39220537. The next prime is 39220591. The reversal of 39220581 is 18502293.

It is a happy number.

It is not a de Polignac number, because 39220581 - 2⁷ = 39220453 is a prime.

It is a super-2 number, since 2×39220581² = 3076507947955122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39220591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10696 + ... + 13886.

It is an arithmetic number, because the mean of its divisors is an integer number (3476088).

Almost surely, 2^39220581 is an apocalyptic number.

It is an amenable number.

39220581 is a deficient number, since it is larger than the sum of its proper divisors (16396827).

39220581 is a wasteful number, since it uses less digits than its factorization.

39220581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 39220581 is about 6262.6337111474. The cubic root of 39220581 is about 339.7592904095.

The spelling of 39220581 in words is "thirty-nine million, two hundred twenty thousand, five hundred eighty-one".