42520043531 has 8 divisors (see below), whose sum is σ = 48595845600. Its totient is φ = 36444619008.

The previous prime is 42520043479. The next prime is 42520043567. The reversal of 42520043531 is 13534002524.

It is a happy number.

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

It is not a de Polignac number, because 42520043531 - 2³⁰ = 41446301707 is a prime.

It is a super-2 number, since 2×42520043531² (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 = 42520043494 and 42520043503.

It is not an unprimeable number, because it can be changed into a prime (42520043591) 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, 214235 + ... + 361851.

It is an arithmetic number, because the mean of its divisors is an integer number (6074480700).

Almost surely, 2^42520043531 is an apocalyptic number.

42520043531 is a deficient number, since it is larger than the sum of its proper divisors (6075802069).

42520043531 is a wasteful number, since it uses less digits than its factorization.

42520043531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188773.

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 42520043531 in words is "forty-two billion, five hundred twenty million, forty-three thousand, five hundred thirty-one".