52311421 has 4 divisors (see below), whose sum is σ = 52850812. Its totient is φ = 51772032.

The previous prime is 52311409. The next prime is 52311433. The reversal of 52311421 is 12411325.

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 (52311409) and next prime (52311433).

It can be written as a sum of positive squares in 2 ways, for example, as 11492100 + 40819321 = 3390^2 + 6389^2 .

It is a cyclic number.

It is not a de Polignac number, because 52311421 - 2¹¹ = 52309373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52311461) 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, 269550 + ... + 269743.

It is an arithmetic number, because the mean of its divisors is an integer number (13212703).

Almost surely, 2^52311421 is an apocalyptic number.

It is an amenable number.

52311421 is a deficient number, since it is larger than the sum of its proper divisors (539391).

52311421 is an equidigital number, since it uses as much as digits as its factorization.

52311421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539390.

The product of its digits is 240, while the sum is 19.

The square root of 52311421 is about 7232.6634789682. The cubic root of 52311421 is about 373.9947500383.

Adding to 52311421 its reverse (12411325), we get a palindrome (64722746).

The spelling of 52311421 in words is "fifty-two million, three hundred eleven thousand, four hundred twenty-one".