420005553 has 64 divisors (see below), whose sum is σ = 691587072. Its totient is φ = 223534080.

The previous prime is 420005539. The next prime is 420005561. The reversal of 420005553 is 355500024.

It is not a de Polignac number, because 420005553 - 2¹⁴ = 419989169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420005533) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 554451 + ... + 555207.

It is an arithmetic number, because the mean of its divisors is an integer number (10806048).

Almost surely, 2^420005553 is an apocalyptic number.

420005553 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

420005553 is a deficient number, since it is larger than the sum of its proper divisors (271581519).

420005553 is a wasteful number, since it uses less digits than its factorization.

420005553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854.

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 420005553 is about 20494.0370107990. The cubic root of 420005553 is about 748.8905391604.

Adding to 420005553 its reverse (355500024), we get a palindrome (775505577).

The spelling of 420005553 in words is "four hundred twenty million, five thousand, five hundred fifty-three".