243492721025 has 12 divisors (see below), whose sum is σ = 312342387900. Its totient is φ = 188077135680.

The previous prime is 243492720971. The next prime is 243492721067. The reversal of 243492721025 is 520127294342.

It can be written as a sum of positive squares in 6 ways, for example, as 45830674561 + 197662046464 = 214081^2 + 444592^2 .

It is not a de Polignac number, because 243492721025 - 2²⁶ = 243425612161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167925290 + ... + 167926739.

It is an arithmetic number, because the mean of its divisors is an integer number (26028532325).

Almost surely, 2^243492721025 is an apocalyptic number.

243492721025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243492721025 is a deficient number, since it is larger than the sum of its proper divisors (68849666875).

243492721025 is a wasteful number, since it uses less digits than its factorization.

243492721025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335852068 (or 335852063 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 243492721025 in words is "two hundred forty-three billion, four hundred ninety-two million, seven hundred twenty-one thousand, twenty-five".