42240131 has 2 divisors, whose sum is σ = 42240132. Its totient is φ = 42240130.

The previous prime is 42240109. The next prime is 42240161. The reversal of 42240131 is 13104224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42240131 - 2¹⁴ = 42223747 is a prime.

It is a super-2 number, since 2×42240131² = 3568457333794322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42240161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21120065 + 21120066.

It is an arithmetic number, because the mean of its divisors is an integer number (21120066).

Almost surely, 2^42240131 is an apocalyptic number.

42240131 is a deficient number, since it is larger than the sum of its proper divisors (1).

42240131 is an equidigital number, since it uses as much as digits as its factorization.

42240131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 42240131 is about 6499.2408018168. The cubic root of 42240131 is about 348.2638676728.

Adding to 42240131 its reverse (13104224), we get a palindrome (55344355).

The spelling of 42240131 in words is "forty-two million, two hundred forty thousand, one hundred thirty-one".