420244553 has 4 divisors (see below), whose sum is σ = 421371588. Its totient is φ = 419117520.

The previous prime is 420244549. The next prime is 420244567. The reversal of 420244553 is 355442024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 208600249 + 211644304 = 14443^2 + 14548^2 .

It is a cyclic number.

It is not a de Polignac number, because 420244553 - 2² = 420244549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420244543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 562958 + ... + 563703.

It is an arithmetic number, because the mean of its divisors is an integer number (105342897).

Almost surely, 2^420244553 is an apocalyptic number.

It is an amenable number.

420244553 is a deficient number, since it is larger than the sum of its proper divisors (1127035).

420244553 is a wasteful number, since it uses less digits than its factorization.

420244553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127034.

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 420244553 is about 20499.8671459110. The cubic root of 420244553 is about 749.0325618062.

Adding to 420244553 its reverse (355442024), we get a palindrome (775686577).

The spelling of 420244553 in words is "four hundred twenty million, two hundred forty-four thousand, five hundred fifty-three".