150021317 has 4 divisors (see below), whose sum is σ = 150079020. Its totient is φ = 149963616.

The previous prime is 150021301. The next prime is 150021343. The reversal of 150021317 is 713120051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 713120051 = 7 ⋅101874293.

It can be written as a sum of positive squares in 2 ways, for example, as 112063396 + 37957921 = 10586^2 + 6161^2 .

It is a cyclic number.

It is not a de Polignac number, because 150021317 - 2⁴ = 150021301 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 (150021517) 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, 24758 + ... + 30215.

It is an arithmetic number, because the mean of its divisors is an integer number (37519755).

Almost surely, 2^150021317 is an apocalyptic number.

It is an amenable number.

150021317 is a deficient number, since it is larger than the sum of its proper divisors (57703).

150021317 is an equidigital number, since it uses as much as digits as its factorization.

150021317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57702.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 150021317 is about 12248.3189458799. The cubic root of 150021317 is about 531.3544530577.

Adding to 150021317 its reverse (713120051), we get a palindrome (863141368).

The spelling of 150021317 in words is "one hundred fifty million, twenty-one thousand, three hundred seventeen".