53750921 has 8 divisors (see below), whose sum is σ = 61490880. Its totient is φ = 46026288.

The previous prime is 53750881. The next prime is 53750929. The reversal of 53750921 is 12905735.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53750921 - 2⁶ = 53750857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53750929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5075 + ... + 11543.

It is an arithmetic number, because the mean of its divisors is an integer number (7686360).

Almost surely, 2^53750921 is an apocalyptic number.

It is an amenable number.

53750921 is a deficient number, since it is larger than the sum of its proper divisors (7739959).

53750921 is a wasteful number, since it uses less digits than its factorization.

53750921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7663.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 53750921 is about 7331.5019607172. The cubic root of 53750921 is about 377.3942712254.

The spelling of 53750921 in words is "fifty-three million, seven hundred fifty thousand, nine hundred twenty-one".