42203131 has 2 divisors, whose sum is σ = 42203132. Its totient is φ = 42203130.

The previous prime is 42203111. The next prime is 42203171. The reversal of 42203131 is 13130224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42203131 - 2⁷ = 42203003 is a prime.

It is a super-2 number, since 2×42203131² = 3562208532406322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42203111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21101565 + 21101566.

It is an arithmetic number, because the mean of its divisors is an integer number (21101566).

Almost surely, 2^42203131 is an apocalyptic number.

42203131 is a deficient number, since it is larger than the sum of its proper divisors (1).

42203131 is an equidigital number, since it uses as much as digits as its factorization.

42203131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 42203131 is about 6496.3936918878. The cubic root of 42203131 is about 348.1621513899.

Adding to 42203131 its reverse (13130224), we get a palindrome (55333355).

The spelling of 42203131 in words is "forty-two million, two hundred three thousand, one hundred thirty-one".