150115621 has 4 divisors (see below), whose sum is σ = 150313644. Its totient is φ = 149917600.

The previous prime is 150115619. The next prime is 150115631. The reversal of 150115621 is 126511051.

It is a happy number.

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 15880225 + 134235396 = 3985^2 + 11586^2 .

It is a cyclic number.

It is not a de Polignac number, because 150115621 - 2¹ = 150115619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 150115592 and 150115601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150115631) 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, 97870 + ... + 99391.

It is an arithmetic number, because the mean of its divisors is an integer number (37578411).

Almost surely, 2^150115621 is an apocalyptic number.

It is an amenable number.

150115621 is a deficient number, since it is larger than the sum of its proper divisors (198023).

150115621 is an equidigital number, since it uses as much as digits as its factorization.

150115621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198022.

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

The square root of 150115621 is about 12252.1680122336. The cubic root of 150115621 is about 531.4657669151.

Adding to 150115621 its reverse (126511051), we get a palindrome (276626672).

The spelling of 150115621 in words is "one hundred fifty million, one hundred fifteen thousand, six hundred twenty-one".