42031354521 has 16 divisors (see below), whose sum is σ = 60379393536. Its totient is φ = 25854014976.

The previous prime is 42031354517. The next prime is 42031354559. The reversal of 42031354521 is 12545313024.

It is not a de Polignac number, because 42031354521 - 2² = 42031354517 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42031354021) 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, 148425 + ... + 325718.

It is an arithmetic number, because the mean of its divisors is an integer number (3773712096).

Almost surely, 2^42031354521 is an apocalyptic number.

It is an amenable number.

42031354521 is a deficient number, since it is larger than the sum of its proper divisors (18348039015).

42031354521 is a wasteful number, since it uses less digits than its factorization.

42031354521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476432.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 42031354521 its reverse (12545313024), we get a palindrome (54576667545).

The spelling of 42031354521 in words is "forty-two billion, thirty-one million, three hundred fifty-four thousand, five hundred twenty-one".