243151155 has 24 divisors (see below), whose sum is σ = 453883248. Its totient is φ = 119704896.

The previous prime is 243151133. The next prime is 243151169. The reversal of 243151155 is 551151342.

It is not a de Polignac number, because 243151155 - 2⁵ = 243151123 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 207237 + ... + 208406.

It is an arithmetic number, because the mean of its divisors is an integer number (18911802).

Almost surely, 2^243151155 is an apocalyptic number.

243151155 is a deficient number, since it is larger than the sum of its proper divisors (210732093).

243151155 is a wasteful number, since it uses less digits than its factorization.

243151155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415667 (or 415664 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 243151155 is about 15593.3048132845. The cubic root of 243151155 is about 624.1545090144.

The spelling of 243151155 in words is "two hundred forty-three million, one hundred fifty-one thousand, one hundred fifty-five".