42357031 has 2 divisors, whose sum is σ = 42357032. Its totient is φ = 42357030.

The previous prime is 42357019. The next prime is 42357041. The reversal of 42357031 is 13075324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42357031 - 2¹⁹ = 41832743 is a prime.

It is a super-2 number, since 2×42357031² = 3588236150269922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42356987 and 42357005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42357041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21178515 + 21178516.

It is an arithmetic number, because the mean of its divisors is an integer number (21178516).

Almost surely, 2^42357031 is an apocalyptic number.

42357031 is a deficient number, since it is larger than the sum of its proper divisors (1).

42357031 is an equidigital number, since it uses as much as digits as its factorization.

42357031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 42357031 is about 6508.2279462231. The cubic root of 42357031 is about 348.5848463709.

The spelling of 42357031 in words is "forty-two million, three hundred fifty-seven thousand, thirty-one".