243120501025 has 12 divisors (see below), whose sum is σ = 301534411500. Its totient is φ = 194454471680.

The previous prime is 243120500983. The next prime is 243120501049. The reversal of 243120501025 is 520105021342.

It can be written as a sum of positive squares in 6 ways, for example, as 3021481024 + 240099020001 = 54968^2 + 489999^2 .

It is not a de Polignac number, because 243120501025 - 2¹¹ = 243120498977 is a prime.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 929680 + ... + 1162129.

It is an arithmetic number, because the mean of its divisors is an integer number (25127867625).

Almost surely, 2^243120501025 is an apocalyptic number.

243120501025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243120501025 is a deficient number, since it is larger than the sum of its proper divisors (58413910475).

243120501025 is a wasteful number, since it uses less digits than its factorization.

243120501025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096468 (or 2096463 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 243120501025 its reverse (520105021342), we get a palindrome (763225522367).

The spelling of 243120501025 in words is "two hundred forty-three billion, one hundred twenty million, five hundred one thousand, twenty-five".