421235553 has 8 divisors (see below), whose sum is σ = 565225408. Its totient is φ = 279034704.

The previous prime is 421235531. The next prime is 421235587. The reversal of 421235553 is 355532124.

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

It is not a de Polignac number, because 421235553 - 2¹³ = 421227361 is a prime.

It is a super-2 number, since 2×421235553² = 354878782222431618, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421235553.

It is not an unprimeable number, because it can be changed into a prime (421235513) 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, 446701 + ... + 447642.

It is an arithmetic number, because the mean of its divisors is an integer number (70653176).

Almost surely, 2^421235553 is an apocalyptic number.

It is an amenable number.

421235553 is a deficient number, since it is larger than the sum of its proper divisors (143989855).

421235553 is a wasteful number, since it uses less digits than its factorization.

421235553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894503.

The product of its digits is 18000, while the sum is 30.

The square root of 421235553 is about 20524.0238013894. The cubic root of 421235553 is about 749.6208768309.

Adding to 421235553 its reverse (355532124), we get a palindrome (776767677).

The spelling of 421235553 in words is "four hundred twenty-one million, two hundred thirty-five thousand, five hundred fifty-three".