421404303552351 has 24 divisors (see below), whose sum is σ = 653891223386160. Its totient is φ = 240697625519232.

The previous prime is 421404303552347. The next prime is 421404303552371. The reversal of 421404303552351 is 153255303404124.

It is not a de Polignac number, because 421404303552351 - 2² = 421404303552347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421404303552371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 623671036 + ... + 624346353.

It is an arithmetic number, because the mean of its divisors is an integer number (27245467641090).

Almost surely, 2^{421404303552351} is an apocalyptic number.

421404303552351 is a deficient number, since it is larger than the sum of its proper divisors (232486919833809).

421404303552351 is a wasteful number, since it uses less digits than its factorization.

421404303552351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248019703 (or 1248019696 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 42.

Adding to 421404303552351 its reverse (153255303404124), we get a palindrome (574659606956475).

The spelling of 421404303552351 in words is "four hundred twenty-one trillion, four hundred four billion, three hundred three million, five hundred fifty-two thousand, three hundred fifty-one".