42603131 has 2 divisors, whose sum is σ = 42603132. Its totient is φ = 42603130.

The previous prime is 42603091. The next prime is 42603161. The reversal of 42603131 is 13130624.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42603131 is a prime.

It is a super-2 number, since 2×42603131² = 3630053542006322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42603161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21301565 + 21301566.

It is an arithmetic number, because the mean of its divisors is an integer number (21301566).

Almost surely, 2^42603131 is an apocalyptic number.

42603131 is a deficient number, since it is larger than the sum of its proper divisors (1).

42603131 is an equidigital number, since it uses as much as digits as its factorization.

42603131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 42603131 is about 6527.1073991470. The cubic root of 42603131 is about 349.2586512369.

Adding to 42603131 its reverse (13130624), we get a palindrome (55733755).

The spelling of 42603131 in words is "forty-two million, six hundred three thousand, one hundred thirty-one".