150138805 has 4 divisors (see below), whose sum is σ = 180166572. Its totient is φ = 120111040.

The previous prime is 150138803. The next prime is 150138809. The reversal of 150138805 is 508831051.

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 105329169 + 44809636 = 10263^2 + 6694^2 .

It is not a de Polignac number, because 150138805 - 2¹ = 150138803 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150138803) 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, 15013876 + ... + 15013885.

It is an arithmetic number, because the mean of its divisors is an integer number (45041643).

Almost surely, 2^150138805 is an apocalyptic number.

It is an amenable number.

150138805 is a deficient number, since it is larger than the sum of its proper divisors (30027767).

150138805 is an equidigital number, since it uses as much as digits as its factorization.

150138805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30027766.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 150138805 is about 12253.1140939763. The cubic root of 150138805 is about 531.4931255337.

Adding to 150138805 its reverse (508831051), we get a palindrome (658969856).

The spelling of 150138805 in words is "one hundred fifty million, one hundred thirty-eight thousand, eight hundred five".