303243213997 has 4 divisors (see below), whose sum is σ = 306369432796. Its totient is φ = 300116995200.

The previous prime is 303243213937. The next prime is 303243214093. The reversal of 303243213997 is 799312342303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 799312342303 = 41 ⋅19495422983.

It can be written as a sum of positive squares in 2 ways, for example, as 82724689161 + 220518524836 = 287619^2 + 469594^2 .

It is a cyclic number.

It is not a de Polignac number, because 303243213997 - 2¹⁵ = 303243181229 is a prime.

It is a super-3 number, since 3×303243213997³ (a number of 35 digits) contains 333 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 (303243213937) 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, 1563109254 + ... + 1563109447.

It is an arithmetic number, because the mean of its divisors is an integer number (76592358199).

Almost surely, 2^303243213997 is an apocalyptic number.

It is an amenable number.

303243213997 is a deficient number, since it is larger than the sum of its proper divisors (3126218799).

303243213997 is an equidigital number, since it uses as much as digits as its factorization.

303243213997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3126218798.

The product of its (nonzero) digits is 734832, while the sum is 46.

The spelling of 303243213997 in words is "three hundred three billion, two hundred forty-three million, two hundred thirteen thousand, nine hundred ninety-seven".