42258031 has 2 divisors, whose sum is σ = 42258032. Its totient is φ = 42258030.

The previous prime is 42257989. The next prime is 42258043. The reversal of 42258031 is 13085224.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42258031 is a prime.

It is a super-2 number, since 2×42258031² = 3571482367993922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42257987 and 42258005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42258091) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21129015 + 21129016.

It is an arithmetic number, because the mean of its divisors is an integer number (21129016).

Almost surely, 2^42258031 is an apocalyptic number.

42258031 is a deficient number, since it is larger than the sum of its proper divisors (1).

42258031 is an equidigital number, since it uses as much as digits as its factorization.

42258031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 42258031 is about 6500.6177398767. The cubic root of 42258031 is about 348.3130550428.

The spelling of 42258031 in words is "forty-two million, two hundred fifty-eight thousand, thirty-one".