53400223 has 4 divisors (see below), whose sum is σ = 55241640. Its totient is φ = 51558808.

The previous prime is 53400209. The next prime is 53400229. The reversal of 53400223 is 32200435.

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

It is a cyclic number.

It is not a de Polignac number, because 53400223 - 2⁹ = 53399711 is a prime.

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 53400223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53400229) 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, 920665 + ... + 920722.

It is an arithmetic number, because the mean of its divisors is an integer number (13810410).

Almost surely, 2^53400223 is an apocalyptic number.

53400223 is a deficient number, since it is larger than the sum of its proper divisors (1841417).

53400223 is a wasteful number, since it uses less digits than its factorization.

53400223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841416.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 53400223 is about 7307.5456207950. The cubic root of 53400223 is about 376.5717097763.

Adding to 53400223 its reverse (32200435), we get a palindrome (85600658).

The spelling of 53400223 in words is "fifty-three million, four hundred thousand, two hundred twenty-three".