42145220355 has 32 divisors (see below), whose sum is σ = 80416226304. Its totient is φ = 18428716416.

The previous prime is 42145220339. The next prime is 42145220357. The reversal of 42145220355 is 55302254124.

It is a happy number.

It is not a de Polignac number, because 42145220355 - 2⁴ = 42145220339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42145220357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8723304 + ... + 8728133.

It is an arithmetic number, because the mean of its divisors is an integer number (2513007072).

Almost surely, 2^42145220355 is an apocalyptic number.

42145220355 is a deficient number, since it is larger than the sum of its proper divisors (38271005949).

42145220355 is a wasteful number, since it uses less digits than its factorization.

42145220355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17451475.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 42145220355 its reverse (55302254124), we get a palindrome (97447474479).

The spelling of 42145220355 in words is "forty-two billion, one hundred forty-five million, two hundred twenty thousand, three hundred fifty-five".