515880361 has 2 divisors, whose sum is σ = 515880362. Its totient is φ = 515880360.

The previous prime is 515880329. The next prime is 515880383. The reversal of 515880361 is 163088515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399240361 + 116640000 = 19981^2 + 10800^2 .

It is a cyclic number.

It is not a de Polignac number, because 515880361 - 2⁵ = 515880329 is a prime.

It is a super-2 number, since 2×515880361² = 532265093730980642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 515880361.

It is not a weakly prime, because it can be changed into another prime (515880301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257940180 + 257940181.

It is an arithmetic number, because the mean of its divisors is an integer number (257940181).

Almost surely, 2^515880361 is an apocalyptic number.

It is an amenable number.

515880361 is a deficient number, since it is larger than the sum of its proper divisors (1).

515880361 is an equidigital number, since it uses as much as digits as its factorization.

515880361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 515880361 is about 22712.9998238894. Note that the first 3 decimals coincide. The cubic root of 515880361 is about 802.0159370842.

The spelling of 515880361 in words is "five hundred fifteen million, eight hundred eighty thousand, three hundred sixty-one".