2001431441 has 4 divisors (see below), whose sum is σ = 2050246884. Its totient is φ = 1952616000.

The previous prime is 2001431407. The next prime is 2001431461. The reversal of 2001431441 is 1441341002.

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 609843025 + 1391588416 = 24695^2 + 37304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001431441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001431461) 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, 24407660 + ... + 24407741.

It is an arithmetic number, because the mean of its divisors is an integer number (512561721).

Almost surely, 2^2001431441 is an apocalyptic number.

It is an amenable number.

2001431441 is a deficient number, since it is larger than the sum of its proper divisors (48815443).

2001431441 is an equidigital number, since it uses as much as digits as its factorization.

2001431441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48815442.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2001431441 is about 44737.3606843318. The cubic root of 2001431441 is about 1260.2215619866.

Adding to 2001431441 its reverse (1441341002), we get a palindrome (3442772443).

The spelling of 2001431441 in words is "two billion, one million, four hundred thirty-one thousand, four hundred forty-one".