52143421 has 16 divisors (see below), whose sum is σ = 59189760. Its totient is φ = 45501120.

The previous prime is 52143401. The next prime is 52143449. The reversal of 52143421 is 12434125.

It is a cyclic number.

It is not a de Polignac number, because 52143421 - 2¹⁷ = 52012349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52143392 and 52143401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52143401) 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, 70771 + ... + 71503.

It is an arithmetic number, because the mean of its divisors is an integer number (3699360).

Almost surely, 2^52143421 is an apocalyptic number.

It is an amenable number.

52143421 is a deficient number, since it is larger than the sum of its proper divisors (7046339).

52143421 is a wasteful number, since it uses less digits than its factorization.

52143421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996.

The product of its digits is 960, while the sum is 22.

The square root of 52143421 is about 7221.0401605309. The cubic root of 52143421 is about 373.5939548357.

Adding to 52143421 its reverse (12434125), we get a palindrome (64577546).

The spelling of 52143421 in words is "fifty-two million, one hundred forty-three thousand, four hundred twenty-one".