243253715 has 4 divisors (see below), whose sum is σ = 291904464. Its totient is φ = 194602968.

The previous prime is 243253691. The next prime is 243253757. The reversal of 243253715 is 517352342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243253715 - 2¹² = 243249619 is a prime.

It is a super-2 number, since 2×243253715² = 118344739722602450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24325367 + ... + 24325376.

It is an arithmetic number, because the mean of its divisors is an integer number (72976116).

Almost surely, 2^243253715 is an apocalyptic number.

243253715 is a deficient number, since it is larger than the sum of its proper divisors (48650749).

243253715 is an equidigital number, since it uses as much as digits as its factorization.

243253715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48650748.

The product of its digits is 25200, while the sum is 32.

The square root of 243253715 is about 15596.5930574597. The cubic root of 243253715 is about 624.2422518129.

The spelling of 243253715 in words is "two hundred forty-three million, two hundred fifty-three thousand, seven hundred fifteen".