42155023231 has 16 divisors (see below), whose sum is σ = 44843904000. Its totient is φ = 39544341408.

The previous prime is 42155023223. The next prime is 42155023243. The reversal of 42155023231 is 13232055124.

It is a cyclic number.

It is not a de Polignac number, because 42155023231 - 2³ = 42155023223 is a prime.

It is a super-2 number, since 2×42155023231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42155023231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42155023201) 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, 192880 + ... + 348586.

It is an arithmetic number, because the mean of its divisors is an integer number (2802744000).

Almost surely, 2^42155023231 is an apocalyptic number.

42155023231 is a deficient number, since it is larger than the sum of its proper divisors (2688880769).

42155023231 is a wasteful number, since it uses less digits than its factorization.

42155023231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155958.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 42155023231 its reverse (13232055124), we get a palindrome (55387078355).

The spelling of 42155023231 in words is "forty-two billion, one hundred fifty-five million, twenty-three thousand, two hundred thirty-one".