150211561 has 4 divisors (see below), whose sum is σ = 155391300. Its totient is φ = 145031824.

The previous prime is 150211559. The next prime is 150211571. The reversal of 150211561 is 165112051.

It is a happy number.

150211561 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 can be written as a sum of positive squares in 2 ways, for example, as 78216336 + 71995225 = 8844^2 + 8485^2 .

It is a cyclic number.

It is not a de Polignac number, because 150211561 - 2¹ = 150211559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150211531) 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, 2589826 + ... + 2589883.

It is an arithmetic number, because the mean of its divisors is an integer number (38847825).

Almost surely, 2^150211561 is an apocalyptic number.

It is an amenable number.

150211561 is a deficient number, since it is larger than the sum of its proper divisors (5179739).

150211561 is an equidigital number, since it uses as much as digits as its factorization.

150211561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5179738.

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 150211561 is about 12256.0826123195. The cubic root of 150211561 is about 531.5789640333.

The spelling of 150211561 in words is "one hundred fifty million, two hundred eleven thousand, five hundred sixty-one".