52345123421 has 4 divisors (see below), whose sum is σ = 53007720000. Its totient is φ = 51682526844.

The previous prime is 52345123417. The next prime is 52345123429. The reversal of 52345123421 is 12432154325.

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 a cyclic number.

It is not a de Polignac number, because 52345123421 - 2² = 52345123417 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 (52345123429) 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, 331298171 + ... + 331298328.

It is an arithmetic number, because the mean of its divisors is an integer number (13251930000).

Almost surely, 2^52345123421 is an apocalyptic number.

It is an amenable number.

52345123421 is a deficient number, since it is larger than the sum of its proper divisors (662596579).

52345123421 is an equidigital number, since it uses as much as digits as its factorization.

52345123421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662596578.

The product of its digits is 28800, while the sum is 32.

Adding to 52345123421 its reverse (12432154325), we get a palindrome (64777277746).

The spelling of 52345123421 in words is "fifty-two billion, three hundred forty-five million, one hundred twenty-three thousand, four hundred twenty-one".