243351403 has 2 divisors, whose sum is σ = 243351404. Its totient is φ = 243351402.

The previous prime is 243351401. The next prime is 243351439. The reversal of 243351403 is 304153342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243351403 - 2¹ = 243351401 is a prime.

Together with 243351401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (243351401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121675701 + 121675702.

It is an arithmetic number, because the mean of its divisors is an integer number (121675702).

Almost surely, 2^243351403 is an apocalyptic number.

243351403 is a deficient number, since it is larger than the sum of its proper divisors (1).

243351403 is an equidigital number, since it uses as much as digits as its factorization.

243351403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 243351403 is about 15599.7244526947. The cubic root of 243351403 is about 624.3258035562.

The spelling of 243351403 in words is "two hundred forty-three million, three hundred fifty-one thousand, four hundred three".