53422921 has 4 divisors (see below), whose sum is σ = 53451972. Its totient is φ = 53393872.

The previous prime is 53422913. The next prime is 53422937. The reversal of 53422921 is 12922435.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28472896 + 24950025 = 5336^2 + 4995^2 .

It is a cyclic number.

It is not a de Polignac number, because 53422921 - 2³ = 53422913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53422921.

It is not an unprimeable number, because it can be changed into a prime (53422981) 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, 11566 + ... + 15511.

It is an arithmetic number, because the mean of its divisors is an integer number (13362993).

Almost surely, 2^53422921 is an apocalyptic number.

It is an amenable number.

53422921 is a deficient number, since it is larger than the sum of its proper divisors (29051).

53422921 is a wasteful number, since it uses less digits than its factorization.

53422921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29050.

The product of its digits is 4320, while the sum is 28.

The square root of 53422921 is about 7309.0985080241. The cubic root of 53422921 is about 376.6250567065.

The spelling of 53422921 in words is "fifty-three million, four hundred twenty-two thousand, nine hundred twenty-one".