42198081 has 4 divisors (see below), whose sum is σ = 56264112. Its totient is φ = 28132052.

The previous prime is 42198073. The next prime is 42198119. The reversal of 42198081 is 18089124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42198081 - 2³ = 42198073 is a prime.

It is a super-2 number, since 2×42198081² = 3561356080165122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42198001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7033011 + ... + 7033016.

It is an arithmetic number, because the mean of its divisors is an integer number (14066028).

Almost surely, 2^42198081 is an apocalyptic number.

It is an amenable number.

42198081 is a deficient number, since it is larger than the sum of its proper divisors (14066031).

42198081 is a wasteful number, since it uses less digits than its factorization.

42198081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14066030.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 42198081 is about 6496.0050030769. The cubic root of 42198081 is about 348.1482638816.

The spelling of 42198081 in words is "forty-two million, one hundred ninety-eight thousand, eighty-one".