42054312132521 has 8 divisors (see below), whose sum is σ = 45432127549704. Its totient is φ = 38696906476800.

The previous prime is 42054312132517. The next prime is 42054312132527. The reversal of 42054312132521 is 12523121345024.

It can be written as a sum of positive squares in 4 ways, for example, as 2732144526400 + 39322167606121 = 1652920^2 + 6270739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42054312132521 - 2² = 42054312132517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42054312132527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5102436080 + ... + 5102444321.

It is an arithmetic number, because the mean of its divisors is an integer number (5679015943713).

Almost surely, 2^{42054312132521} is an apocalyptic number.

It is an amenable number.

42054312132521 is a deficient number, since it is larger than the sum of its proper divisors (3377815417183).

42054312132521 is a wasteful number, since it uses less digits than its factorization.

42054312132521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10204880731.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 42054312132521 its reverse (12523121345024), we get a palindrome (54577433477545).

The spelling of 42054312132521 in words is "forty-two trillion, fifty-four billion, three hundred twelve million, one hundred thirty-two thousand, five hundred twenty-one".