42115138131 has 64 divisors (see below), whose sum is σ = 64365396480. Its totient is φ = 24264576000.

The previous prime is 42115138129. The next prime is 42115138183. The reversal of 42115138131 is 13183151124.

It is not a de Polignac number, because 42115138131 - 2¹ = 42115138129 is a prime.

It is a super-2 number, since 2×42115138131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42115138531) 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, 41248401 + ... + 41249421.

It is an arithmetic number, because the mean of its divisors is an integer number (1005709320).

Almost surely, 2^42115138131 is an apocalyptic number.

42115138131 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

42115138131 is a deficient number, since it is larger than the sum of its proper divisors (22250258349).

42115138131 is a wasteful number, since it uses less digits than its factorization.

42115138131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828.

The product of its digits is 2880, while the sum is 30.

Adding to 42115138131 its reverse (13183151124), we get a palindrome (55298289255).

The spelling of 42115138131 in words is "forty-two billion, one hundred fifteen million, one hundred thirty-eight thousand, one hundred thirty-one".