243331413851 has 2 divisors, whose sum is σ = 243331413852. Its totient is φ = 243331413850.

The previous prime is 243331413811. The next prime is 243331413887. The reversal of 243331413851 is 158314133342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243331413851 is a prime.

It is not a weakly prime, because it can be changed into another prime (243331413811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121665706925 + 121665706926.

It is an arithmetic number, because the mean of its divisors is an integer number (121665706926).

Almost surely, 2^243331413851 is an apocalyptic number.

243331413851 is a deficient number, since it is larger than the sum of its proper divisors (1).

243331413851 is an equidigital number, since it uses as much as digits as its factorization.

243331413851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 38.

The spelling of 243331413851 in words is "two hundred forty-three billion, three hundred thirty-one million, four hundred thirteen thousand, eight hundred fifty-one".