52021423 has 4 divisors (see below), whose sum is σ = 54283248. Its totient is φ = 49759600.

The previous prime is 52021399. The next prime is 52021451. The reversal of 52021423 is 32412025.

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

It is a cyclic number.

It is not a de Polignac number, because 52021423 - 2⁹ = 52020911 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 52021423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52021493) 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, 1130878 + ... + 1130923.

It is an arithmetic number, because the mean of its divisors is an integer number (13570812).

Almost surely, 2^52021423 is an apocalyptic number.

52021423 is a deficient number, since it is larger than the sum of its proper divisors (2261825).

52021423 is a wasteful number, since it uses less digits than its factorization.

52021423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261824.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 52021423 is about 7212.5878157566. The cubic root of 52021423 is about 373.3023660716.

Adding to 52021423 its reverse (32412025), we get a palindrome (84433448).

The spelling of 52021423 in words is "fifty-two million, twenty-one thousand, four hundred twenty-three".