42031066521 has 16 divisors (see below), whose sum is σ = 56635070336. Its totient is φ = 27724363776.

The previous prime is 42031066513. The next prime is 42031066531. The reversal of 42031066521 is 12566013024.

It is not a de Polignac number, because 42031066521 - 2³ = 42031066513 is a prime.

It is a super-2 number, since 2×42031066521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42031066531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297291 + ... + 415263.

It is an arithmetic number, because the mean of its divisors is an integer number (3539691896).

Almost surely, 2^42031066521 is an apocalyptic number.

It is an amenable number.

42031066521 is a deficient number, since it is larger than the sum of its proper divisors (14604003815).

42031066521 is a wasteful number, since it uses less digits than its factorization.

42031066521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119232.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 42031066521 its reverse (12566013024), we get a palindrome (54597079545).

The spelling of 42031066521 in words is "forty-two billion, thirty-one million, sixty-six thousand, five hundred twenty-one".