515142863 has 4 divisors (see below), whose sum is σ = 532906440. Its totient is φ = 497379288.

The previous prime is 515142851. The next prime is 515142883. The reversal of 515142863 is 368241515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-515142863 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 (515142883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8881745 + ... + 8881802.

It is an arithmetic number, because the mean of its divisors is an integer number (133226610).

Almost surely, 2^515142863 is an apocalyptic number.

515142863 is a deficient number, since it is larger than the sum of its proper divisors (17763577).

515142863 is a wasteful number, since it uses less digits than its factorization.

515142863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17763576.

The product of its digits is 28800, while the sum is 35.

The square root of 515142863 is about 22696.7588655297. The cubic root of 515142863 is about 801.6335698540.

The spelling of 515142863 in words is "five hundred fifteen million, one hundred forty-two thousand, eight hundred sixty-three".