42154221262 has 4 divisors (see below), whose sum is σ = 63231331896. Its totient is φ = 21077110630.

The previous prime is 42154221257. The next prime is 42154221271. The reversal of 42154221262 is 26212245124.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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, 10538555314 + ... + 10538555317.

It is an arithmetic number, because the mean of its divisors is an integer number (15807832974).

Almost surely, 2^42154221262 is an apocalyptic number.

42154221262 is a deficient number, since it is larger than the sum of its proper divisors (21077110634).

42154221262 is a wasteful number, since it uses less digits than its factorization.

42154221262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21077110633.

The product of its digits is 15360, while the sum is 31.

Adding to 42154221262 its reverse (26212245124), we get a palindrome (68366466386).

The spelling of 42154221262 in words is "forty-two billion, one hundred fifty-four million, two hundred twenty-one thousand, two hundred sixty-two".