42144331 has 2 divisors, whose sum is σ = 42144332. Its totient is φ = 42144330.

The previous prime is 42144307. The next prime is 42144353. The reversal of 42144331 is 13344124.

It is an a-pointer prime, because the next prime (42144353) can be obtained adding 42144331 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42144331 - 2¹³ = 42136139 is a prime.

It is a super-2 number, since 2×42144331² = 3552289270875122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42144301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21072165 + 21072166.

It is an arithmetic number, because the mean of its divisors is an integer number (21072166).

Almost surely, 2^42144331 is an apocalyptic number.

42144331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42144331 is an equidigital number, since it uses as much as digits as its factorization.

42144331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 22.

The square root of 42144331 is about 6491.8665266624. The cubic root of 42144331 is about 348.0003825909. Note that the first 3 decimals are identical.

Adding to 42144331 its reverse (13344124), we get a palindrome (55488455).

The spelling of 42144331 in words is "forty-two million, one hundred forty-four thousand, three hundred thirty-one".