42655552531 has 2 divisors, whose sum is σ = 42655552532. Its totient is φ = 42655552530.

The previous prime is 42655552529. The next prime is 42655552559. The reversal of 42655552531 is 13525555624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42655552531 - 2¹ = 42655552529 is a prime.

It is a super-2 number, since 2×42655552531² (a number of 22 digits) contains 22 as substring.

Together with 42655552529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42655552631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21327776265 + 21327776266.

It is an arithmetic number, because the mean of its divisors is an integer number (21327776266).

Almost surely, 2^42655552531 is an apocalyptic number.

42655552531 is a deficient number, since it is larger than the sum of its proper divisors (1).

42655552531 is an equidigital number, since it uses as much as digits as its factorization.

42655552531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900000, while the sum is 43.

The spelling of 42655552531 in words is "forty-two billion, six hundred fifty-five million, five hundred fifty-two thousand, five hundred thirty-one".