243420504025 has 36 divisors (see below), whose sum is σ = 332414831232. Its totient is φ = 176465789280.

The previous prime is 243420503981. The next prime is 243420504121. The reversal of 243420504025 is 520405024342.

It is not a de Polignac number, because 243420504025 - 2⁷ = 243420503897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 378769 + ... + 793918.

It is an arithmetic number, because the mean of its divisors is an integer number (9233745312).

Almost surely, 2^243420504025 is an apocalyptic number.

243420504025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243420504025 is a deficient number, since it is larger than the sum of its proper divisors (88994327207).

243420504025 is a wasteful number, since it uses less digits than its factorization.

243420504025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172758 (or 1172734 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 31.

Adding to 243420504025 its reverse (520405024342), we get a palindrome (763825528367).

The spelling of 243420504025 in words is "two hundred forty-three billion, four hundred twenty million, five hundred four thousand, twenty-five".