53400321 has 24 divisors (see below), whose sum is σ = 85752576. Its totient is φ = 31799520.

The previous prime is 53400289. The next prime is 53400323. The reversal of 53400321 is 12300435.

53400321 is a `hidden beast` number, since 5 + 340 + 0 + 321 = 666.

It is not a de Polignac number, because 53400321 - 2⁵ = 53400289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53400294 and 53400303.

It is not an unprimeable number, because it can be changed into a prime (53400323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3735 + ... + 10988.

It is an arithmetic number, because the mean of its divisors is an integer number (3573024).

Almost surely, 2^53400321 is an apocalyptic number.

It is an amenable number.

53400321 is a deficient number, since it is larger than the sum of its proper divisors (32352255).

53400321 is a wasteful number, since it uses less digits than its factorization.

53400321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14773 (or 14770 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 53400321 is about 7307.5523261897. The cubic root of 53400321 is about 376.5719401374.

Adding to 53400321 its reverse (12300435), we get a palindrome (65700756).

The spelling of 53400321 in words is "fifty-three million, four hundred thousand, three hundred twenty-one".