52404312312021 has 4 divisors (see below), whose sum is σ = 69872416416032. Its totient is φ = 34936208208012.

The previous prime is 52404312312019. The next prime is 52404312312029. The reversal of 52404312312021 is 12021321340425.

It is a happy number.

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 not a de Polignac number, because 52404312312021 - 2¹ = 52404312312019 is a prime.

It is a super-2 number, since 2×52404312312021² (a number of 28 digits) contains 22 as substring.

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 52404312312021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52404312312029) 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, 8734052052001 + ... + 8734052052006.

It is an arithmetic number, because the mean of its divisors is an integer number (17468104104008).

Almost surely, 2^{52404312312021} is an apocalyptic number.

It is an amenable number.

52404312312021 is a deficient number, since it is larger than the sum of its proper divisors (17468104104011).

52404312312021 is a wasteful number, since it uses less digits than its factorization.

52404312312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17468104104010.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 52404312312021 its reverse (12021321340425), we get a palindrome (64425633652446).

The spelling of 52404312312021 in words is "fifty-two trillion, four hundred four billion, three hundred twelve million, three hundred twelve thousand, twenty-one".