152120181 has 4 divisors (see below), whose sum is σ = 202826912. Its totient is φ = 101413452.

The previous prime is 152120179. The next prime is 152120203. The reversal of 152120181 is 181021251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 152120181 - 2¹ = 152120179 is a prime.

It is a super-2 number, since 2×152120181² = 46281098934945522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152120161) 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 in 3 ways as a sum of consecutive naturals, for example, 25353361 + ... + 25353366.

It is an arithmetic number, because the mean of its divisors is an integer number (50706728).

Almost surely, 2^152120181 is an apocalyptic number.

It is an amenable number.

152120181 is a deficient number, since it is larger than the sum of its proper divisors (50706731).

152120181 is an equidigital number, since it uses as much as digits as its factorization.

152120181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50706730.

The product of its (nonzero) digits is 160, while the sum is 21.

The square root of 152120181 is about 12333.7010260505. The cubic root of 152120181 is about 533.8209467163.

The spelling of 152120181 in words is "one hundred fifty-two million, one hundred twenty thousand, one hundred eighty-one".