52451064421 has 4 divisors (see below), whose sum is σ = 59944073632. Its totient is φ = 44958055212.

The previous prime is 52451064409. The next prime is 52451064443. The reversal of 52451064421 is 12446015425.

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 de Polignac number, because none of the positive numbers 2^k-52451064421 is a prime.

It is a super-3 number, since 3×52451064421³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52451064401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3746504595 + ... + 3746504608.

It is an arithmetic number, because the mean of its divisors is an integer number (14986018408).

Almost surely, 2^52451064421 is an apocalyptic number.

It is an amenable number.

52451064421 is a deficient number, since it is larger than the sum of its proper divisors (7493009211).

52451064421 is an equidigital number, since it uses as much as digits as its factorization.

52451064421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7493009210.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 52451064421 its reverse (12446015425), we get a palindrome (64897079846).

The spelling of 52451064421 in words is "fifty-two billion, four hundred fifty-one million, sixty-four thousand, four hundred twenty-one".