515252149 has 4 divisors (see below), whose sum is σ = 516898636. Its totient is φ = 513605664.

The previous prime is 515252137. The next prime is 515252159. The reversal of 515252149 is 941252515.

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 152349649 + 362902500 = 12343^2 + 19050^2 .

It is a cyclic number.

It is not a de Polignac number, because 515252149 - 2⁷ = 515252021 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 (515252119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822774 + ... + 823399.

It is an arithmetic number, because the mean of its divisors is an integer number (129224659).

Almost surely, 2^515252149 is an apocalyptic number.

It is an amenable number.

515252149 is a deficient number, since it is larger than the sum of its proper divisors (1646487).

515252149 is a wasteful number, since it uses less digits than its factorization.

515252149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646486.

The product of its digits is 18000, while the sum is 34.

The square root of 515252149 is about 22699.1662622221. The cubic root of 515252149 is about 801.6902538913.

The spelling of 515252149 in words is "five hundred fifteen million, two hundred fifty-two thousand, one hundred forty-nine".