7243819381 has 8 divisors (see below), whose sum is σ = 7346977560. Its totient is φ = 7141145088.

The previous prime is 7243819343. The next prime is 7243819393. The reversal of 7243819381 is 1839183427.

It can be written as a sum of positive squares in 4 ways, for example, as 558140625 + 6685678756 = 23625^2 + 81766^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7243819381 - 2³¹ = 5096335733 is a prime.

It is a super-2 number, since 2×7243819381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7243819301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90766 + ... + 150751.

It is an arithmetic number, because the mean of its divisors is an integer number (918372195).

Almost surely, 2^7243819381 is an apocalyptic number.

It is an amenable number.

7243819381 is a deficient number, since it is larger than the sum of its proper divisors (103158179).

7243819381 is a wasteful number, since it uses less digits than its factorization.

7243819381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241943.

The product of its digits is 290304, while the sum is 46.

The square root of 7243819381 is about 85110.6302467559. The cubic root of 7243819381 is about 1934.8881774300. Note that the first 3 decimals are identical.

It can be divided in two parts, 72438 and 19381, that added together give a palindrome (91819).

The spelling of 7243819381 in words is "seven billion, two hundred forty-three million, eight hundred nineteen thousand, three hundred eighty-one".