42155224145 has 16 divisors (see below), whose sum is σ = 50670219600. Its totient is φ = 33668265984.

The previous prime is 42155224123. The next prime is 42155224147. The reversal of 42155224145 is 54142255124.

It can be written as a sum of positive squares in 8 ways, for example, as 1457406976 + 40697817169 = 38176^2 + 201737^2 .

It is a cyclic number.

It is not a de Polignac number, because 42155224145 - 2¹² = 42155220049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42155224147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14857667 + ... + 14860503.

It is an arithmetic number, because the mean of its divisors is an integer number (3166888725).

Almost surely, 2^42155224145 is an apocalyptic number.

It is an amenable number.

42155224145 is a deficient number, since it is larger than the sum of its proper divisors (8514995455).

42155224145 is a wasteful number, since it uses less digits than its factorization.

42155224145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6724.

The product of its digits is 64000, while the sum is 35.

Adding to 42155224145 its reverse (54142255124), we get a palindrome (96297479269).

The spelling of 42155224145 in words is "forty-two billion, one hundred fifty-five million, two hundred twenty-four thousand, one hundred forty-five".