42163031 has 2 divisors, whose sum is σ = 42163032. Its totient is φ = 42163030.

The previous prime is 42163027. The next prime is 42163063. The reversal of 42163031 is 13036124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42163031 - 2² = 42163027 is a prime.

It is a super-2 number, since 2×42163031² = 3555442366213922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42162994 and 42163012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42163931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21081515 + 21081516.

It is an arithmetic number, because the mean of its divisors is an integer number (21081516).

Almost surely, 2^42163031 is an apocalyptic number.

42163031 is a deficient number, since it is larger than the sum of its proper divisors (1).

42163031 is an equidigital number, since it uses as much as digits as its factorization.

42163031 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 42163031 is about 6493.3066306775. The cubic root of 42163031 is about 348.0518457788.

Adding to 42163031 its reverse (13036124), we get a palindrome (55199155).

The spelling of 42163031 in words is "forty-two million, one hundred sixty-three thousand, thirty-one".