150561553 has 4 divisors (see below), whose sum is σ = 154233828. Its totient is φ = 146889280.

The previous prime is 150561517. The next prime is 150561563. The reversal of 150561553 is 355165051.

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 38031889 + 112529664 = 6167^2 + 10608^2 .

It is a cyclic number.

It is not a de Polignac number, because 150561553 - 2⁹ = 150561041 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150561563) 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, 1836076 + ... + 1836157.

It is an arithmetic number, because the mean of its divisors is an integer number (38558457).

Almost surely, 2^150561553 is an apocalyptic number.

It is an amenable number.

150561553 is a deficient number, since it is larger than the sum of its proper divisors (3672275).

150561553 is an equidigital number, since it uses as much as digits as its factorization.

150561553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672274.

The product of its (nonzero) digits is 11250, while the sum is 31.

The square root of 150561553 is about 12270.3526029206. The cubic root of 150561553 is about 531.9915023517.

The spelling of 150561553 in words is "one hundred fifty million, five hundred sixty-one thousand, five hundred fifty-three".