2445312021 has 4 divisors (see below), whose sum is σ = 3260416032. Its totient is φ = 1630208012.

The previous prime is 2445311983. The next prime is 2445312031. The reversal of 2445312021 is 1202135442.

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 2445312021 - 2³¹ = 297828373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2445311982 and 2445312000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2445312031) 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, 407552001 + ... + 407552006.

It is an arithmetic number, because the mean of its divisors is an integer number (815104008).

Almost surely, 2^2445312021 is an apocalyptic number.

It is an amenable number.

2445312021 is a deficient number, since it is larger than the sum of its proper divisors (815104011).

2445312021 is an equidigital number, since it uses as much as digits as its factorization.

2445312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815104010.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2445312021 is about 49450.0962688648. The cubic root of 2445312021 is about 1347.2393555281.

Adding to 2445312021 its reverse (1202135442), we get a palindrome (3647447463).

The spelling of 2445312021 in words is "two billion, four hundred forty-five million, three hundred twelve thousand, twenty-one".