1243041331 has 16 divisors (see below), whose sum is σ = 1431256320. Its totient is φ = 1057517280.

The previous prime is 1243041271. The next prime is 1243041337. The reversal of 1243041331 is 1331403421.

It is a cyclic number.

It is not a de Polignac number, because 1243041331 - 2⁷ = 1243041203 is a prime.

It is a super-2 number, since 2×1243041331² = 3090303501148503122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243041337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617116 + ... + 619126.

It is an arithmetic number, because the mean of its divisors is an integer number (89453520).

Almost surely, 2^1243041331 is an apocalyptic number.

1243041331 is a deficient number, since it is larger than the sum of its proper divisors (188214989).

1243041331 is a wasteful number, since it uses less digits than its factorization.

1243041331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1243041331 is about 35256.7912748736. The cubic root of 1243041331 is about 1075.2146911390.

Adding to 1243041331 its reverse (1331403421), we get a palindrome (2574444752).

The spelling of 1243041331 in words is "one billion, two hundred forty-three million, forty-one thousand, three hundred thirty-one".