42622281 has 40 divisors (see below), whose sum is σ = 72631944. Its totient is φ = 24675840.

The previous prime is 42622271. The next prime is 42622297. The reversal of 42622281 is 18222624.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 46656 + 42575625 = 216^2 + 6525^2 .

It is not a de Polignac number, because 42622281 - 2¹¹ = 42620233 is a prime.

It is a super-2 number, since 2×42622281² = 3633317675285922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (42622231) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16711 + ... + 19091.

Almost surely, 2^42622281 is an apocalyptic number.

It is an amenable number.

42622281 is a deficient number, since it is larger than the sum of its proper divisors (30009663).

42622281 is a wasteful number, since it uses less digits than its factorization.

42622281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423 (or 2414 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 42622281 is about 6528.5741934974. The cubic root of 42622281 is about 349.3109736925.

The spelling of 42622281 in words is "forty-two million, six hundred twenty-two thousand, two hundred eighty-one".