42331591 has 2 divisors, whose sum is σ = 42331592. Its totient is φ = 42331590.

The previous prime is 42331579. The next prime is 42331603. The reversal of 42331591 is 19513324.

It is a balanced prime because it is at equal distance from previous prime (42331579) and next prime (42331603).

It is a cyclic number.

It is not a de Polignac number, because 42331591 - 2⁵ = 42331559 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42331511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21165795 + 21165796.

It is an arithmetic number, because the mean of its divisors is an integer number (21165796).

Almost surely, 2^42331591 is an apocalyptic number.

42331591 is a deficient number, since it is larger than the sum of its proper divisors (1).

42331591 is an equidigital number, since it uses as much as digits as its factorization.

42331591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 42331591 is about 6506.2732036090. The cubic root of 42331591 is about 348.5150447010.

The spelling of 42331591 in words is "forty-two million, three hundred thirty-one thousand, five hundred ninety-one".