2043240401 has 4 divisors (see below), whose sum is σ = 2054529204. Its totient is φ = 2031951600.

The previous prime is 2043240391. The next prime is 2043240457. The reversal of 2043240401 is 1040423402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1040423402 = 2 ⋅520211701.

It can be written as a sum of positive squares in 2 ways, for example, as 144024001 + 1899216400 = 12001^2 + 43580^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043240401 - 2¹⁸ = 2042978257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2043242401) 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, 5644130 + ... + 5644491.

It is an arithmetic number, because the mean of its divisors is an integer number (513632301).

Almost surely, 2^2043240401 is an apocalyptic number.

It is an amenable number.

2043240401 is a deficient number, since it is larger than the sum of its proper divisors (11288803).

2043240401 is a wasteful number, since it uses less digits than its factorization.

2043240401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11288802.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2043240401 is about 45202.2167708620. The cubic root of 2043240401 is about 1268.9363034240.

Adding to 2043240401 its reverse (1040423402), we get a palindrome (3083663803).

The spelling of 2043240401 in words is "two billion, forty-three million, two hundred forty thousand, four hundred one".