42165602131 has 4 divisors (see below), whose sum is σ = 42167772712. Its totient is φ = 42163431552.

The previous prime is 42165602111. The next prime is 42165602177. The reversal of 42165602131 is 13120656124.

It is a happy number.

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 42165602131 - 2⁵ = 42165602099 is a prime.

It is a super-2 number, since 2×42165602131² (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 = 42165602093 and 42165602102.

It is not an unprimeable number, because it can be changed into a prime (42165602111) 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, 1055886 + ... + 1095091.

It is an arithmetic number, because the mean of its divisors is an integer number (10541943178).

Almost surely, 2^42165602131 is an apocalyptic number.

42165602131 is a deficient number, since it is larger than the sum of its proper divisors (2170581).

42165602131 is a wasteful number, since it uses less digits than its factorization.

42165602131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170580.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 42165602131 in words is "forty-two billion, one hundred sixty-five million, six hundred two thousand, one hundred thirty-one".