53404521 has 4 divisors (see below), whose sum is σ = 71206032. Its totient is φ = 35603012.

The previous prime is 53404513. The next prime is 53404523. The reversal of 53404521 is 12540435.

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 53404521 - 2³ = 53404513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53404491 and 53404500.

It is not an unprimeable number, because it can be changed into a prime (53404523) 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, 8900751 + ... + 8900756.

It is an arithmetic number, because the mean of its divisors is an integer number (17801508).

Almost surely, 2^53404521 is an apocalyptic number.

It is an amenable number.

53404521 is a deficient number, since it is larger than the sum of its proper divisors (17801511).

53404521 is a wasteful number, since it uses less digits than its factorization.

53404521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17801510.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 53404521 is about 7307.8396944651. The cubic root of 53404521 is about 376.5818124918.

Adding to 53404521 its reverse (12540435), we get a palindrome (65944956).

The spelling of 53404521 in words is "fifty-three million, four hundred four thousand, five hundred twenty-one".