53245921 has 16 divisors (see below), whose sum is σ = 58544640. Its totient is φ = 48222720.

The previous prime is 53245901. The next prime is 53245937. The reversal of 53245921 is 12954235.

It is a 2-Lehmer number, since φ(53245921) divides (53245921-1)².

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 53245921 - 2¹³ = 53237729 is a prime.

It is a deceptive number, since it divides R_53245920.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53245901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54580 + ... + 55546.

It is an arithmetic number, because the mean of its divisors is an integer number (3659040).

It is a Poulet number, since it divides 2^53245920-1.

Almost surely, 2^53245921 is an apocalyptic number.

It is an amenable number.

53245921 is a deficient number, since it is larger than the sum of its proper divisors (5298719).

53245921 is a wasteful number, since it uses less digits than its factorization.

53245921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104.

The product of its digits is 10800, while the sum is 31.

The square root of 53245921 is about 7296.9802658360. The cubic root of 53245921 is about 376.2086537128.

The spelling of 53245921 in words is "fifty-three million, two hundred forty-five thousand, nine hundred twenty-one".