515015252 has 6 divisors (see below), whose sum is σ = 901276698. Its totient is φ = 257507624.

The previous prime is 515015239. The next prime is 515015339. The reversal of 515015252 is 252510515.

It can be written as a sum of positive squares in only one way, i.e., 511031236 + 3984016 = 22606^2 + 1996^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 64376903 + ... + 64376910.

It is an arithmetic number, because the mean of its divisors is an integer number (150212783).

Almost surely, 2^515015252 is an apocalyptic number.

It is an amenable number.

515015252 is a deficient number, since it is larger than the sum of its proper divisors (386261446).

515015252 is a wasteful number, since it uses less digits than its factorization.

515015252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128753817 (or 128753815 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 515015252 is about 22693.9474750428. The cubic root of 515015252 is about 801.5673709300.

Adding to 515015252 its reverse (252510515), we get a palindrome (767525767).

It can be divided in two parts, 5150 and 15252, that added together give a palindrome (20402).

The spelling of 515015252 in words is "five hundred fifteen million, fifteen thousand, two hundred fifty-two".