155504234 has 4 divisors (see below), whose sum is σ = 233256354. Its totient is φ = 77752116.

The previous prime is 155504231. The next prime is 155504263. The reversal of 155504234 is 432405551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 432405551 = 7369 ⋅58679.

It can be written as a sum of positive squares in only one way, i.e., 151905625 + 3598609 = 12325^2 + 1897^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155504197 and 155504206.

It is not an unprimeable number, because it can be changed into a prime (155504231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38876057 + ... + 38876060.

Almost surely, 2^155504234 is an apocalyptic number.

155504234 is a deficient number, since it is larger than the sum of its proper divisors (77752120).

155504234 is an equidigital number, since it uses as much as digits as its factorization.

155504234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77752119.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 155504234 is about 12470.1336801175. The cubic root of 155504234 is about 537.7503966921.

Adding to 155504234 its reverse (432405551), we get a palindrome (587909785).

The spelling of 155504234 in words is "one hundred fifty-five million, five hundred four thousand, two hundred thirty-four".