420515553 has 16 divisors (see below), whose sum is σ = 594089856. Its totient is φ = 263665920.

The previous prime is 420515539. The next prime is 420515561. The reversal of 420515553 is 355515024.

It is a happy number.

It is not a de Polignac number, because 420515553 - 2⁶ = 420515489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420515553.

It is not an unprimeable number, because it can be changed into a prime (420515153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119700 + ... + 123162.

It is an arithmetic number, because the mean of its divisors is an integer number (37130616).

Almost surely, 2^420515553 is an apocalyptic number.

It is an amenable number.

420515553 is a deficient number, since it is larger than the sum of its proper divisors (173574303).

420515553 is a wasteful number, since it uses less digits than its factorization.

420515553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5864.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 420515553 is about 20506.4758795850. The cubic root of 420515553 is about 749.1935349073.

The spelling of 420515553 in words is "four hundred twenty million, five hundred fifteen thousand, five hundred fifty-three".