154238155 has 4 divisors (see below), whose sum is σ = 185085792. Its totient is φ = 123390520.

The previous prime is 154238131. The next prime is 154238159. The reversal of 154238155 is 551832451.

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

It is a de Polignac number, because none of the positive numbers 2^k-154238155 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154238155.

It is not an unprimeable number, because it can be changed into a prime (154238159) 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, 15423811 + ... + 15423820.

It is an arithmetic number, because the mean of its divisors is an integer number (46271448).

Almost surely, 2^154238155 is an apocalyptic number.

154238155 is a deficient number, since it is larger than the sum of its proper divisors (30847637).

154238155 is an equidigital number, since it uses as much as digits as its factorization.

154238155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30847636.

The product of its digits is 24000, while the sum is 34.

The square root of 154238155 is about 12419.2654774749. The cubic root of 154238155 is about 536.2870054137.

The spelling of 154238155 in words is "one hundred fifty-four million, two hundred thirty-eight thousand, one hundred fifty-five".