52806421 has 4 divisors (see below), whose sum is σ = 53033292. Its totient is φ = 52579552.

The previous prime is 52806409. The next prime is 52806433. The reversal of 52806421 is 12460825.

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

It is an interprime number because it is at equal distance from previous prime (52806409) and next prime (52806433).

It can be written as a sum of positive squares in 2 ways, for example, as 13242321 + 39564100 = 3639^2 + 6290^2 .

It is a cyclic number.

It is not a de Polignac number, because 52806421 - 2⁵ = 52806389 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 52806421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52866421) 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, 113086 + ... + 113551.

It is an arithmetic number, because the mean of its divisors is an integer number (13258323).

Almost surely, 2^52806421 is an apocalyptic number.

It is an amenable number.

52806421 is a deficient number, since it is larger than the sum of its proper divisors (226871).

52806421 is a wasteful number, since it uses less digits than its factorization.

52806421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226870.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 52806421 is about 7266.8026669231. The cubic root of 52806421 is about 375.1706979911.

The spelling of 52806421 in words is "fifty-two million, eight hundred six thousand, four hundred twenty-one".