42165154221 has 8 divisors (see below), whose sum is σ = 56247922080. Its totient is φ = 28096244592.

The previous prime is 42165154211. The next prime is 42165154223. The reversal of 42165154221 is 12245156124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42165154221 - 2⁵ = 42165154189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42165154223) 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 in 7 ways as a sum of consecutive naturals, for example, 3457455 + ... + 3469628.

It is an arithmetic number, because the mean of its divisors is an integer number (7030990260).

Almost surely, 2^42165154221 is an apocalyptic number.

It is an amenable number.

42165154221 is a deficient number, since it is larger than the sum of its proper divisors (14082767859).

42165154221 is a wasteful number, since it uses less digits than its factorization.

42165154221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6929115.

The product of its digits is 19200, while the sum is 33.

The spelling of 42165154221 in words is "forty-two billion, one hundred sixty-five million, one hundred fifty-four thousand, two hundred twenty-one".