42203661 has 4 divisors (see below), whose sum is σ = 56271552. Its totient is φ = 28135772.

The previous prime is 42203659. The next prime is 42203669. The reversal of 42203661 is 16630224.

42203661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42203661 - 2¹ = 42203659 is a prime.

It is a super-2 number, since 2×42203661² = 3562298003605842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42203669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7033941 + ... + 7033946.

It is an arithmetic number, because the mean of its divisors is an integer number (14067888).

Almost surely, 2^42203661 is an apocalyptic number.

It is an amenable number.

42203661 is a deficient number, since it is larger than the sum of its proper divisors (14067891).

42203661 is a wasteful number, since it uses less digits than its factorization.

42203661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14067890.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 42203661 is about 6496.4344836225. The cubic root of 42203661 is about 348.1636088265.

Adding to 42203661 its reverse (16630224), we get a palindrome (58833885).

The spelling of 42203661 in words is "forty-two million, two hundred three thousand, six hundred sixty-one".