243155530 has 8 divisors (see below), whose sum is σ = 437679972. Its totient is φ = 97262208.

The previous prime is 243155509. The next prime is 243155551. The reversal of 243155530 is 35551342.

243155530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (243155509) and next prime (243155551).

It can be written as a sum of positive squares in 2 ways, for example, as 207907561 + 35247969 = 14419^2 + 5937^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×243155530² = 118249223539161800, which contains 22 as substring.

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, 12157767 + ... + 12157786.

Almost surely, 2^243155530 is an apocalyptic number.

243155530 is a deficient number, since it is larger than the sum of its proper divisors (194524442).

243155530 is a wasteful number, since it uses less digits than its factorization.

243155530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24315560.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 243155530 is about 15593.4450972195. The cubic root of 243155530 is about 624.1582524466.

The spelling of 243155530 in words is "two hundred forty-three million, one hundred fifty-five thousand, five hundred thirty".