42161461231 has 4 divisors (see below), whose sum is σ = 42379914592. Its totient is φ = 41943007872.

The previous prime is 42161461229. The next prime is 42161461259. The reversal of 42161461231 is 13216416124.

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 42161461231 - 2¹ = 42161461229 is a prime.

It is a super-2 number, since 2×42161461231² (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 = 42161461193 and 42161461202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42161461271) 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, 109226391 + ... + 109226776.

It is an arithmetic number, because the mean of its divisors is an integer number (10594978648).

Almost surely, 2^42161461231 is an apocalyptic number.

42161461231 is a deficient number, since it is larger than the sum of its proper divisors (218453361).

42161461231 is a wasteful number, since it uses less digits than its factorization.

42161461231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218453360.

The product of its digits is 6912, while the sum is 31.

Adding to 42161461231 its reverse (13216416124), we get a palindrome (55377877355).

The spelling of 42161461231 in words is "forty-two billion, one hundred sixty-one million, four hundred sixty-one thousand, two hundred thirty-one".