42031424421 has 16 divisors (see below), whose sum is σ = 71164316800. Its totient is φ = 24017956704.

The previous prime is 42031424381. The next prime is 42031424437. The reversal of 42031424421 is 12442413024.

42031424421 is a `hidden beast` number, since 4 + 203 + 14 + 2 + 442 + 1 = 666.

It is not a de Polignac number, because 42031424421 - 2²⁵ = 41997869989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42031424321) 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, 111194056 + ... + 111194433.

It is an arithmetic number, because the mean of its divisors is an integer number (4447769800).

Almost surely, 2^42031424421 is an apocalyptic number.

It is an amenable number.

42031424421 is a deficient number, since it is larger than the sum of its proper divisors (29132892379).

42031424421 is a wasteful number, since it uses less digits than its factorization.

42031424421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222388505 (or 222388499 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 42031424421 its reverse (12442413024), we get a palindrome (54473837445).

The spelling of 42031424421 in words is "forty-two billion, thirty-one million, four hundred twenty-four thousand, four hundred twenty-one".