515352131 has 4 divisors (see below), whose sum is σ = 588973872. Its totient is φ = 441730392.

The previous prime is 515352121. The next prime is 515352137. The reversal of 515352131 is 131253515.

It is a happy number.

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-515352131 is a prime.

It is a super-2 number, since 2×515352131² = 531175637852482322, which contains 22 as substring.

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 515352131.

It is not an unprimeable number, because it can be changed into a prime (515352137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36810860 + ... + 36810873.

It is an arithmetic number, because the mean of its divisors is an integer number (147243468).

Almost surely, 2^515352131 is an apocalyptic number.

515352131 is a deficient number, since it is larger than the sum of its proper divisors (73621741).

515352131 is an equidigital number, since it uses as much as digits as its factorization.

515352131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73621740.

The product of its digits is 2250, while the sum is 26.

The square root of 515352131 is about 22701.3684829792. The cubic root of 515352131 is about 801.7421051458.

The spelling of 515352131 in words is "five hundred fifteen million, three hundred fifty-two thousand, one hundred thirty-one".