421643142432255 has 32 divisors (see below), whose sum is σ = 684145940940288. Its totient is φ = 221704178057600.

The previous prime is 421643142432221. The next prime is 421643142432287. The reversal of 421643142432255 is 552234241346124.

It is not a de Polignac number, because 421643142432255 - 2¹⁵ = 421643142399487 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44173000 + ... + 52863410.

It is an arithmetic number, because the mean of its divisors is an integer number (21379560654384).

Almost surely, 2^{421643142432255} is an apocalyptic number.

421643142432255 is a deficient number, since it is larger than the sum of its proper divisors (262502798508033).

421643142432255 is a wasteful number, since it uses less digits than its factorization.

421643142432255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8736047.

The product of its digits is 5529600, while the sum is 48.

Adding to 421643142432255 its reverse (552234241346124), we get a palindrome (973877383778379).

The spelling of 421643142432255 in words is "four hundred twenty-one trillion, six hundred forty-three billion, one hundred forty-two million, four hundred thirty-two thousand, two hundred fifty-five".