152238191 has 4 divisors (see below), whose sum is σ = 173986512. Its totient is φ = 130489872.

The previous prime is 152238187. The next prime is 152238199. The reversal of 152238191 is 191832251.

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 152238191 - 2² = 152238187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152238199) 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, 10874150 + ... + 10874163.

It is an arithmetic number, because the mean of its divisors is an integer number (43496628).

Almost surely, 2^152238191 is an apocalyptic number.

152238191 is a deficient number, since it is larger than the sum of its proper divisors (21748321).

152238191 is an equidigital number, since it uses as much as digits as its factorization.

152238191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21748320.

The product of its digits is 4320, while the sum is 32.

The square root of 152238191 is about 12338.4841451452. The cubic root of 152238191 is about 533.9589514754.

The spelling of 152238191 in words is "one hundred fifty-two million, two hundred thirty-eight thousand, one hundred ninety-one".