153423505 has 4 divisors (see below), whose sum is σ = 184108212. Its totient is φ = 122738800.

The previous prime is 153423481. The next prime is 153423509. The reversal of 153423505 is 505324351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505324351 = 7 ⋅72189193.

It can be written as a sum of positive squares in 2 ways, for example, as 94809169 + 58614336 = 9737^2 + 7656^2 .

It is not a de Polignac number, because 153423505 - 2¹⁹ = 152899217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153423509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15342346 + ... + 15342355.

It is an arithmetic number, because the mean of its divisors is an integer number (46027053).

Almost surely, 2^153423505 is an apocalyptic number.

It is an amenable number.

153423505 is a deficient number, since it is larger than the sum of its proper divisors (30684707).

153423505 is an equidigital number, since it uses as much as digits as its factorization.

153423505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30684706.

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

The square root of 153423505 is about 12386.4242217034. The cubic root of 153423505 is about 535.3411571982.

Adding to 153423505 its reverse (505324351), we get a palindrome (658747856).

The spelling of 153423505 in words is "one hundred fifty-three million, four hundred twenty-three thousand, five hundred five".