42431413021 has 4 divisors (see below), whose sum is σ = 43418190112. Its totient is φ = 41444635932.

The previous prime is 42431413001. The next prime is 42431413049. The reversal of 42431413021 is 12031413424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42431413021 - 2⁹ = 42431412509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42431413001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493388481 + ... + 493388566.

It is an arithmetic number, because the mean of its divisors is an integer number (10854547528).

Almost surely, 2^42431413021 is an apocalyptic number.

It is an amenable number.

42431413021 is a deficient number, since it is larger than the sum of its proper divisors (986777091).

42431413021 is an equidigital number, since it uses as much as digits as its factorization.

42431413021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986777090.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 42431413021 its reverse (12031413424), we get a palindrome (54462826445).

The spelling of 42431413021 in words is "forty-two billion, four hundred thirty-one million, four hundred thirteen thousand, twenty-one".