243420432100 has 18 divisors (see below), whose sum is σ = 528222337874. Its totient is φ = 97368172800.

The previous prime is 243420432077. The next prime is 243420432113. The reversal of 243420432100 is 1234024342.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 43427225664 + 199993206436 = 208392^2 + 447206^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1217102061 + ... + 1217102260.

Almost surely, 2^243420432100 is an apocalyptic number.

243420432100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243420432100 is an abundant number, since it is smaller than the sum of its proper divisors (284801905774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243420432100 is a wasteful number, since it uses less digits than its factorization.

243420432100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434204335 (or 2434204328 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 243420432100 its reverse (1234024342), we get a palindrome (244654456442).

The spelling of 243420432100 in words is "two hundred forty-three billion, four hundred twenty million, four hundred thirty-two thousand, one hundred".