42748331 has 2 divisors, whose sum is σ = 42748332. Its totient is φ = 42748330.

The previous prime is 42748297. The next prime is 42748367. The reversal of 42748331 is 13384724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42748331 - 2¹⁰ = 42747307 is a prime.

It is a super-2 number, since 2×42748331² = 3654839606571122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42748031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21374165 + 21374166.

It is an arithmetic number, because the mean of its divisors is an integer number (21374166).

Almost surely, 2^42748331 is an apocalyptic number.

42748331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42748331 is an equidigital number, since it uses as much as digits as its factorization.

42748331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 32.

The square root of 42748331 is about 6538.2207824453. The cubic root of 42748331 is about 349.6549824547.

The spelling of 42748331 in words is "forty-two million, seven hundred forty-eight thousand, three hundred thirty-one".