42831541 has 2 divisors, whose sum is σ = 42831542. Its totient is φ = 42831540.

The previous prime is 42831539. The next prime is 42831557. The reversal of 42831541 is 14513824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42706225 + 125316 = 6535^2 + 354^2 .

It is a cyclic number.

It is not a de Polignac number, because 42831541 - 2¹ = 42831539 is a prime.

Together with 42831539, it forms a pair of twin primes.

It is equal to p_2595034 and since 42831541 and 2595034 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42832541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21415770 + 21415771.

It is an arithmetic number, because the mean of its divisors is an integer number (21415771).

Almost surely, 2^42831541 is an apocalyptic number.

It is an amenable number.

42831541 is a deficient number, since it is larger than the sum of its proper divisors (1).

42831541 is an equidigital number, since it uses as much as digits as its factorization.

42831541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 42831541 is about 6544.5810408307. The cubic root of 42831541 is about 349.8817042397.

The spelling of 42831541 in words is "forty-two million, eight hundred thirty-one thousand, five hundred forty-one".