150201991 has 8 divisors (see below), whose sum is σ = 157572000. Its totient is φ = 142978080.

The previous prime is 150201959. The next prime is 150202033. The reversal of 150201991 is 199102051.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 150201991 - 2⁵ = 150201959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150201941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34416 + ... + 38533.

It is an arithmetic number, because the mean of its divisors is an integer number (19696500).

Almost surely, 2^150201991 is an apocalyptic number.

150201991 is a deficient number, since it is larger than the sum of its proper divisors (7370009).

150201991 is an equidigital number, since it uses as much as digits as its factorization.

150201991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73049.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 150201991 is about 12255.6921877142. The cubic root of 150201991 is about 531.5676748030.

The spelling of 150201991 in words is "one hundred fifty million, two hundred one thousand, nine hundred ninety-one".