243153457 has 4 divisors (see below), whose sum is σ = 244645360. Its totient is φ = 241661556.

The previous prime is 243153413. The next prime is 243153461. The reversal of 243153457 is 754351342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243153457 - 2¹¹ = 243151409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243153497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745707 + ... + 746032.

It is an arithmetic number, because the mean of its divisors is an integer number (61161340).

Almost surely, 2^243153457 is an apocalyptic number.

It is an amenable number.

243153457 is a deficient number, since it is larger than the sum of its proper divisors (1491903).

243153457 is a wasteful number, since it uses less digits than its factorization.

243153457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491902.

The product of its digits is 50400, while the sum is 34.

The square root of 243153457 is about 15593.3786268403. The cubic root of 243153457 is about 624.1564787071.

It can be divided in two parts, 24315 and 3457, that added together give a palindrome (27772).

The spelling of 243153457 in words is "two hundred forty-three million, one hundred fifty-three thousand, four hundred fifty-seven".