424400021431 has 8 divisors (see below), whose sum is σ = 451717426944. Its totient is φ = 397344026880.

The previous prime is 424400021323. The next prime is 424400021447. The reversal of 424400021431 is 134120004424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424400021431 is a prime.

It is a super-2 number, since 2×424400021431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 424400021396 and 424400021405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424400021491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65349390 + ... + 65355883.

It is an arithmetic number, because the mean of its divisors is an integer number (56464678368).

Almost surely, 2^424400021431 is an apocalyptic number.

424400021431 is a deficient number, since it is larger than the sum of its proper divisors (27317405513).

424400021431 is a wasteful number, since it uses less digits than its factorization.

424400021431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130705481.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 424400021431 its reverse (134120004424), we get a palindrome (558520025855).

The spelling of 424400021431 in words is "four hundred twenty-four billion, four hundred million, twenty-one thousand, four hundred thirty-one".