42219255851 has 2 divisors, whose sum is σ = 42219255852. Its totient is φ = 42219255850.

The previous prime is 42219255847. The next prime is 42219255899. The reversal of 42219255851 is 15855291224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42219255851 - 2² = 42219255847 is a prime.

It is a super-2 number, since 2×42219255851² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42219255821) 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, 21109627925 + 21109627926.

It is an arithmetic number, because the mean of its divisors is an integer number (21109627926).

Almost surely, 2^42219255851 is an apocalyptic number.

42219255851 is a deficient number, since it is larger than the sum of its proper divisors (1).

42219255851 is an equidigital number, since it uses as much as digits as its factorization.

42219255851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288000, while the sum is 44.

The spelling of 42219255851 in words is "forty-two billion, two hundred nineteen million, two hundred fifty-five thousand, eight hundred fifty-one".