420824553 has 4 divisors (see below), whose sum is σ = 561099408. Its totient is φ = 280549700.

The previous prime is 420824513. The next prime is 420824557. The reversal of 420824553 is 355428024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420824553 - 2⁶ = 420824489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420824557) 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, 70137423 + ... + 70137428.

It is an arithmetic number, because the mean of its divisors is an integer number (140274852).

Almost surely, 2^420824553 is an apocalyptic number.

It is an amenable number.

420824553 is a deficient number, since it is larger than the sum of its proper divisors (140274855).

420824553 is a wasteful number, since it uses less digits than its factorization.

420824553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140274854.

The product of its (nonzero) digits is 38400, while the sum is 33.

The square root of 420824553 is about 20514.0087013728. The cubic root of 420824553 is about 749.3769955194.

The spelling of 420824553 in words is "four hundred twenty million, eight hundred twenty-four thousand, five hundred fifty-three".