42156131234 has 16 divisors (see below), whose sum is σ = 72270316800. Its totient is φ = 18066247584.

The previous prime is 42156131221. The next prime is 42156131249. The reversal of 42156131234 is 43213165124.

It is a self number, because there is not a number n which added to its sum of digits gives 42156131234.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630062 + ... + 693750.

It is an arithmetic number, because the mean of its divisors is an integer number (4516894800).

Almost surely, 2^42156131234 is an apocalyptic number.

42156131234 is a deficient number, since it is larger than the sum of its proper divisors (30114185566).

42156131234 is a wasteful number, since it uses less digits than its factorization.

42156131234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110977.

The product of its digits is 17280, while the sum is 32.

Adding to 42156131234 its reverse (43213165124), we get a palindrome (85369296358).

The spelling of 42156131234 in words is "forty-two billion, one hundred fifty-six million, one hundred thirty-one thousand, two hundred thirty-four".