515050121 has 4 divisors (see below), whose sum is σ = 532810500. Its totient is φ = 497289744.

The previous prime is 515050103. The next prime is 515050141. The reversal of 515050121 is 121050515.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 285103225 + 229946896 = 16885^2 + 15164^2 .

It is a cyclic number.

It is not a de Polignac number, because 515050121 - 2⁶ = 515050057 is a prime.

It is a super-2 number, since 2×515050121² = 530553254284229282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 515050093 and 515050102.

It is not an unprimeable number, because it can be changed into a prime (515050141) 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, 8880146 + ... + 8880203.

It is an arithmetic number, because the mean of its divisors is an integer number (133202625).

Almost surely, 2^515050121 is an apocalyptic number.

It is an amenable number.

515050121 is a deficient number, since it is larger than the sum of its proper divisors (17760379).

515050121 is a wasteful number, since it uses less digits than its factorization.

515050121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17760378.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 515050121 is about 22694.7157065252. The cubic root of 515050121 is about 801.5854605055.

The spelling of 515050121 in words is "five hundred fifteen million, fifty thousand, one hundred twenty-one".