153218947 has 4 divisors (see below), whose sum is σ = 175107376. Its totient is φ = 131330520.

The previous prime is 153218921. The next prime is 153218953. The reversal of 153218947 is 749812351.

153218947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 153218947 - 2²⁷ = 19001219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153218047) 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, 10944204 + ... + 10944217.

It is an arithmetic number, because the mean of its divisors is an integer number (43776844).

Almost surely, 2^153218947 is an apocalyptic number.

153218947 is a deficient number, since it is larger than the sum of its proper divisors (21888429).

153218947 is an equidigital number, since it uses as much as digits as its factorization.

153218947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21888428.

The product of its digits is 60480, while the sum is 40.

The square root of 153218947 is about 12378.1641207410. The cubic root of 153218947 is about 535.1031297389.

The spelling of 153218947 in words is "one hundred fifty-three million, two hundred eighteen thousand, nine hundred forty-seven".