153256243 has 4 divisors (see below), whose sum is σ = 175150000. Its totient is φ = 131362488.

The previous prime is 153256211. The next prime is 153256247. The reversal of 153256243 is 342652351.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 153256243 - 2⁵ = 153256211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153256247) 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, 10946868 + ... + 10946881.

It is an arithmetic number, because the mean of its divisors is an integer number (43787500).

Almost surely, 2^153256243 is an apocalyptic number.

153256243 is a deficient number, since it is larger than the sum of its proper divisors (21893757).

153256243 is an equidigital number, since it uses as much as digits as its factorization.

153256243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21893756.

The product of its digits is 21600, while the sum is 31.

The square root of 153256243 is about 12379.6705529671. The cubic root of 153256243 is about 535.1465438371.

It can be divided in two parts, 1532 and 56243, that added together give a palindrome (57775).

The spelling of 153256243 in words is "one hundred fifty-three million, two hundred fifty-six thousand, two hundred forty-three".