42203531 has 2 divisors, whose sum is σ = 42203532. Its totient is φ = 42203530.

The previous prime is 42203527. The next prime is 42203543. The reversal of 42203531 is 13530224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42203531 - 2² = 42203527 is a prime.

It is a super-2 number, since 2×42203531² = 3562276057735922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42203131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21101765 + 21101766.

It is an arithmetic number, because the mean of its divisors is an integer number (21101766).

Almost surely, 2^42203531 is an apocalyptic number.

42203531 is a deficient number, since it is larger than the sum of its proper divisors (1).

42203531 is an equidigital number, since it uses as much as digits as its factorization.

42203531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 42203531 is about 6496.4244781264. The cubic root of 42203531 is about 348.1632513432.

Adding to 42203531 its reverse (13530224), we get a palindrome (55733755).

The spelling of 42203531 in words is "forty-two million, two hundred three thousand, five hundred thirty-one".