151521325 has 6 divisors (see below), whose sum is σ = 187886474. Its totient is φ = 121217040.

The previous prime is 151521319. The next prime is 151521407. The reversal of 151521325 is 523125151.

It can be written as a sum of positive squares in 3 ways, for example, as 7064964 + 144456361 = 2658^2 + 12019^2 .

It is not a de Polignac number, because 151521325 - 2⁷ = 151521197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 6060853 = 151521325 / (1 + 5 + 1 + 5 + 2 + 1 + 3 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 151521325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3030402 + ... + 3030451.

Almost surely, 2^151521325 is an apocalyptic number.

It is an amenable number.

151521325 is a deficient number, since it is larger than the sum of its proper divisors (36365149).

151521325 is an equidigital number, since it uses as much as digits as its factorization.

151521325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060863 (or 6060858 counting only the distinct ones).

The product of its digits is 1500, while the sum is 25.

The square root of 151521325 is about 12309.3998635189. The cubic root of 151521325 is about 533.1195225857.

Adding to 151521325 its reverse (523125151), we get a palindrome (674646476).

The spelling of 151521325 in words is "one hundred fifty-one million, five hundred twenty-one thousand, three hundred twenty-five".