42555615031 has 2 divisors, whose sum is σ = 42555615032. Its totient is φ = 42555615030.

The previous prime is 42555615017. The next prime is 42555615043. The reversal of 42555615031 is 13051655524.

It is a happy number.

42555615031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42555615031 - 2²⁷ = 42421397303 is a prime.

It is a super-2 number, since 2×42555615031² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42555615001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21277807515 + 21277807516.

It is an arithmetic number, because the mean of its divisors is an integer number (21277807516).

Almost surely, 2^42555615031 is an apocalyptic number.

42555615031 is a deficient number, since it is larger than the sum of its proper divisors (1).

42555615031 is an equidigital number, since it uses as much as digits as its factorization.

42555615031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 42555615031 in words is "forty-two billion, five hundred fifty-five million, six hundred fifteen thousand, thirty-one".