515121097 has 4 divisors (see below), whose sum is σ = 545422356. Its totient is φ = 484819840.

The previous prime is 515121049. The next prime is 515121107. The reversal of 515121097 is 790121515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 790121515 = 5 ⋅158024303.

It can be written as a sum of positive squares in 2 ways, for example, as 480968761 + 34152336 = 21931^2 + 5844^2 .

It is a cyclic number.

It is not a de Polignac number, because 515121097 - 2¹¹ = 515119049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (515121197) 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, 15150604 + ... + 15150637.

It is an arithmetic number, because the mean of its divisors is an integer number (136355589).

Almost surely, 2^515121097 is an apocalyptic number.

It is an amenable number.

515121097 is a deficient number, since it is larger than the sum of its proper divisors (30301259).

515121097 is a wasteful number, since it uses less digits than its factorization.

515121097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30301258.

The product of its (nonzero) digits is 3150, while the sum is 31.

The square root of 515121097 is about 22696.2793646888. The cubic root of 515121097 is about 801.6222793924.

The spelling of 515121097 in words is "five hundred fifteen million, one hundred twenty-one thousand, ninety-seven".