242400155 has 8 divisors (see below), whose sum is σ = 290965200. Its totient is φ = 193863456.

The previous prime is 242400131. The next prime is 242400163. The reversal of 242400155 is 551004242.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242400155 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242400155.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24701 + ... + 33089.

It is an arithmetic number, because the mean of its divisors is an integer number (36370650).

Almost surely, 2^242400155 is an apocalyptic number.

242400155 is a deficient number, since it is larger than the sum of its proper divisors (48565045).

242400155 is an equidigital number, since it uses as much as digits as its factorization.

242400155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14173.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 242400155 is about 15569.2053425986. The cubic root of 242400155 is about 623.5112555730.

Adding to 242400155 its reverse (551004242), we get a palindrome (793404397).

The spelling of 242400155 in words is "two hundred forty-two million, four hundred thousand, one hundred fifty-five".