53340921 has 6 divisors (see below), whose sum is σ = 77048010. Its totient is φ = 35560608.

The previous prime is 53340913. The next prime is 53340929. The reversal of 53340921 is 12904335.

53340921 is a `hidden beast` number, since 533 + 40 + 92 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (53340913) and next prime (53340929).

It can be written as a sum of positive squares in only one way, i.e., 44555625 + 8785296 = 6675^2 + 2964^2 .

It is not a de Polignac number, because 53340921 - 2³ = 53340913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53340929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2963376 + ... + 2963393.

It is an arithmetic number, because the mean of its divisors is an integer number (12841335).

Almost surely, 2^53340921 is an apocalyptic number.

It is an amenable number.

53340921 is a deficient number, since it is larger than the sum of its proper divisors (23707089).

53340921 is a wasteful number, since it uses less digits than its factorization.

53340921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5926775 (or 5926772 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 53340921 is about 7303.4869069507. The cubic root of 53340921 is about 376.4322613752.

The spelling of 53340921 in words is "fifty-three million, three hundred forty thousand, nine hundred twenty-one".