42129250831 has 2 divisors, whose sum is σ = 42129250832. Its totient is φ = 42129250830.

The previous prime is 42129250799. The next prime is 42129250843. The reversal of 42129250831 is 13805292124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42129250831 - 2⁵ = 42129250799 is a prime.

It is a super-2 number, since 2×42129250831² (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 (42129250861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21064625415 + 21064625416.

It is an arithmetic number, because the mean of its divisors is an integer number (21064625416).

Almost surely, 2^42129250831 is an apocalyptic number.

42129250831 is a deficient number, since it is larger than the sum of its proper divisors (1).

42129250831 is an equidigital number, since it uses as much as digits as its factorization.

42129250831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 42129250831 in words is "forty-two billion, one hundred twenty-nine million, two hundred fifty thousand, eight hundred thirty-one".