52663421 has 4 divisors (see below), whose sum is σ = 55435200. Its totient is φ = 49891644.

The previous prime is 52663409. The next prime is 52663423. The reversal of 52663421 is 12436625.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 52663421 - 2²² = 48469117 is a prime.

It is a super-2 number, since 2×52663421² = 5546871822846482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52663423) 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, 1385861 + ... + 1385898.

It is an arithmetic number, because the mean of its divisors is an integer number (13858800).

Almost surely, 2^52663421 is an apocalyptic number.

It is an amenable number.

52663421 is a deficient number, since it is larger than the sum of its proper divisors (2771779).

52663421 is a wasteful number, since it uses less digits than its factorization.

52663421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771778.

The product of its digits is 8640, while the sum is 29.

The square root of 52663421 is about 7256.9567313027. The cubic root of 52663421 is about 374.8317372524.

The spelling of 52663421 in words is "fifty-two million, six hundred sixty-three thousand, four hundred twenty-one".