42142625531 has 4 divisors (see below), whose sum is σ = 42143151552. Its totient is φ = 42142099512.

The previous prime is 42142625509. The next prime is 42142625549. The reversal of 42142625531 is 13552624124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42142625531 - 2¹⁰ = 42142624507 is a prime.

It is a super-2 number, since 2×42142625531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42142625491 and 42142625500.

It is not an unprimeable number, because it can be changed into a prime (42142625501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115115 + ... + 312308.

It is an arithmetic number, because the mean of its divisors is an integer number (10535787888).

Almost surely, 2^42142625531 is an apocalyptic number.

42142625531 is a deficient number, since it is larger than the sum of its proper divisors (526021).

42142625531 is an equidigital number, since it uses as much as digits as its factorization.

42142625531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526020.

The product of its digits is 57600, while the sum is 35.

The spelling of 42142625531 in words is "forty-two billion, one hundred forty-two million, six hundred twenty-five thousand, five hundred thirty-one".