42155231157 has 12 divisors (see below), whose sum is σ = 65574804204. Its totient is φ = 25941680640.

The previous prime is 42155231147. The next prime is 42155231171. The reversal of 42155231157 is 75113255124.

42155231157 is a `hidden beast` number, since 4 + 2 + 15 + 523 + 115 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21987254961 + 20167976196 = 148281^2 + 142014^2 .

It is not a de Polignac number, because 42155231157 - 2⁶ = 42155231093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42155231147) 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 11 ways as a sum of consecutive naturals, for example, 180150444 + ... + 180150677.

It is an arithmetic number, because the mean of its divisors is an integer number (5464567017).

Almost surely, 2^42155231157 is an apocalyptic number.

It is an amenable number.

42155231157 is a deficient number, since it is larger than the sum of its proper divisors (23419573047).

42155231157 is a wasteful number, since it uses less digits than its factorization.

42155231157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360301140 (or 360301137 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The spelling of 42155231157 in words is "forty-two billion, one hundred fifty-five million, two hundred thirty-one thousand, one hundred fifty-seven".