42531125091 has 64 divisors (see below), whose sum is σ = 70259245056. Its totient is φ = 22285238400.

The previous prime is 42531125089. The next prime is 42531125173. The reversal of 42531125091 is 19052113524.

It is a happy number.

It is not a de Polignac number, because 42531125091 - 2¹ = 42531125089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42531125041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34549446 + ... + 34550676.

It is an arithmetic number, because the mean of its divisors is an integer number (1097800704).

Almost surely, 2^42531125091 is an apocalyptic number.

42531125091 is a deficient number, since it is larger than the sum of its proper divisors (27728119965).

42531125091 is a wasteful number, since it uses less digits than its factorization.

42531125091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 42531125091 in words is "forty-two billion, five hundred thirty-one million, one hundred twenty-five thousand, ninety-one".