42922581 has 16 divisors (see below), whose sum is σ = 63759360. Its totient is φ = 25502400.

The previous prime is 42922573. The next prime is 42922601. The reversal of 42922581 is 18522924.

It is not a de Polignac number, because 42922581 - 2³ = 42922573 is a prime.

It is a super-2 number, since 2×42922581² = 3684695919403122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42922081) 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, 17845 + ... + 20106.

It is an arithmetic number, because the mean of its divisors is an integer number (3984960).

Almost surely, 2^42922581 is an apocalyptic number.

It is an amenable number.

42922581 is a deficient number, since it is larger than the sum of its proper divisors (20836779).

42922581 is a wasteful number, since it uses less digits than its factorization.

42922581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37996.

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

The square root of 42922581 is about 6551.5327214324. The cubic root of 42922581 is about 350.1294242440.

The spelling of 42922581 in words is "forty-two million, nine hundred twenty-two thousand, five hundred eighty-one".