151521317 has 4 divisors (see below), whose sum is σ = 156746220. Its totient is φ = 146296416.

The previous prime is 151521301. The next prime is 151521319. The reversal of 151521317 is 713125151.

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 103510276 + 48011041 = 10174^2 + 6929^2 .

It is not a de Polignac number, because 151521317 - 2⁴ = 151521301 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 (151521319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2612408 + ... + 2612465.

It is an arithmetic number, because the mean of its divisors is an integer number (39186555).

Almost surely, 2^151521317 is an apocalyptic number.

It is an amenable number.

151521317 is a deficient number, since it is larger than the sum of its proper divisors (5224903).

151521317 is an equidigital number, since it uses as much as digits as its factorization.

151521317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5224902.

The product of its digits is 1050, while the sum is 26.

The square root of 151521317 is about 12309.3995385640. The cubic root of 151521317 is about 533.1195132032.

Adding to 151521317 its reverse (713125151), we get a palindrome (864646468).

The spelling of 151521317 in words is "one hundred fifty-one million, five hundred twenty-one thousand, three hundred seventeen".