42001235131515 has 48 divisors (see below), whose sum is σ = 74133302447904. Its totient is φ = 20290717877760.

The previous prime is 42001235131511. The next prime is 42001235131543. The reversal of 42001235131515 is 51513153210024.

It is not a de Polignac number, because 42001235131515 - 2² = 42001235131511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (42001235131511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41268322 + ... + 42273831.

It is an arithmetic number, because the mean of its divisors is an integer number (1544443800998).

Almost surely, 2^{42001235131515} is an apocalyptic number.

42001235131515 is a deficient number, since it is larger than the sum of its proper divisors (32132067316389).

42001235131515 is a wasteful number, since it uses less digits than its factorization.

42001235131515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83542460 (or 83542449 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

Adding to 42001235131515 its reverse (51513153210024), we get a palindrome (93514388341539).

The spelling of 42001235131515 in words is "forty-two trillion, one billion, two hundred thirty-five million, one hundred thirty-one thousand, five hundred fifteen".