2045311421 has 4 divisors (see below), whose sum is σ = 2046581052. Its totient is φ = 2044041792.

The previous prime is 2045311417. The next prime is 2045311423. The reversal of 2045311421 is 1241135402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1228152025 + 817159396 = 35045^2 + 28586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045311421 - 2² = 2045311417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045311423) 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, 632396 + ... + 635621.

It is an arithmetic number, because the mean of its divisors is an integer number (511645263).

Almost surely, 2^2045311421 is an apocalyptic number.

It is an amenable number.

2045311421 is a deficient number, since it is larger than the sum of its proper divisors (1269631).

2045311421 is a wasteful number, since it uses less digits than its factorization.

2045311421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269630.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2045311421 is about 45225.1193586042. The cubic root of 2045311421 is about 1269.3648881782.

Adding to 2045311421 its reverse (1241135402), we get a palindrome (3286446823).

The spelling of 2045311421 in words is "two billion, forty-five million, three hundred eleven thousand, four hundred twenty-one".