42024431421 has 48 divisors (see below), whose sum is σ = 72461043200. Its totient is φ = 23841064368.

The previous prime is 42024431413. The next prime is 42024431461. The reversal of 42024431421 is 12413442024.

42024431421 is a `hidden beast` number, since 4 + 202 + 4 + 4 + 31 + 421 = 666.

It is not a de Polignac number, because 42024431421 - 2³ = 42024431413 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42024431411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 147570 + ... + 325308.

Almost surely, 2^42024431421 is an apocalyptic number.

It is an amenable number.

42024431421 is a deficient number, since it is larger than the sum of its proper divisors (30436611779).

42024431421 is a wasteful number, since it uses less digits than its factorization.

42024431421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177900 (or 177888 counting only the distinct ones).

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

Adding to 42024431421 its reverse (12413442024), we get a palindrome (54437873445).

The spelling of 42024431421 in words is "forty-two billion, twenty-four million, four hundred thirty-one thousand, four hundred twenty-one".