515115442 has 8 divisors (see below), whose sum is σ = 773765100. Its totient is φ = 257193744.

The previous prime is 515115439. The next prime is 515115457. The reversal of 515115442 is 244511515.

It can be written as a sum of positive squares in 2 ways, for example, as 467381161 + 47734281 = 21619^2 + 6909^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 515115442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180217 + ... + 183052.

Almost surely, 2^515115442 is an apocalyptic number.

515115442 is a deficient number, since it is larger than the sum of its proper divisors (258649658).

515115442 is a wasteful number, since it uses less digits than its factorization.

515115442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363980.

The product of its digits is 4000, while the sum is 28.

The square root of 515115442 is about 22696.1547844563. The cubic root of 515115442 is about 801.6193459783.

Adding to 515115442 its reverse (244511515), we get a palindrome (759626957).

It can be divided in two parts, 51511 and 5442, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 515115442 in words is "five hundred fifteen million, one hundred fifteen thousand, four hundred forty-two".