42154230109 has 2 divisors, whose sum is σ = 42154230110. Its totient is φ = 42154230108.

The previous prime is 42154230077. The next prime is 42154230127. The reversal of 42154230109 is 90103245124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22724658009 + 19429572100 = 150747^2 + 139390^2 .

It is a cyclic number.

It is not a de Polignac number, because 42154230109 - 2⁵ = 42154230077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42154230199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21077115054 + 21077115055.

It is an arithmetic number, because the mean of its divisors is an integer number (21077115055).

Almost surely, 2^42154230109 is an apocalyptic number.

It is an amenable number.

42154230109 is a deficient number, since it is larger than the sum of its proper divisors (1).

42154230109 is an equidigital number, since it uses as much as digits as its factorization.

42154230109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

It can be divided in two parts, 4215 and 4230109, that added together give a palindrome (4234324).

The spelling of 42154230109 in words is "forty-two billion, one hundred fifty-four million, two hundred thirty thousand, one hundred nine".