243251542401 has 32 divisors (see below), whose sum is σ = 373491514368. Its totient is φ = 137946456000.

The previous prime is 243251542367. The next prime is 243251542411. The reversal of 243251542401 is 104245152342.

It is not a de Polignac number, because 243251542401 - 2²³ = 243243153793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243251542411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1376766 + ... + 1543368.

It is an arithmetic number, because the mean of its divisors is an integer number (11671609824).

Almost surely, 2^243251542401 is an apocalyptic number.

243251542401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243251542401 is a deficient number, since it is larger than the sum of its proper divisors (130239971967).

243251542401 is a wasteful number, since it uses less digits than its factorization.

243251542401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167141.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 243251542401 its reverse (104245152342), we get a palindrome (347496694743).

The spelling of 243251542401 in words is "two hundred forty-three billion, two hundred fifty-one million, five hundred forty-two thousand, four hundred one".