515150221 has 8 divisors (see below), whose sum is σ = 526435200. Its totient is φ = 503878848.

The previous prime is 515150161. The next prime is 515150239. The reversal of 515150221 is 122051515.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 515150221 - 2²⁷ = 380932493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 515150192 and 515150201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515150261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125205 + ... + 129253.

It is an arithmetic number, because the mean of its divisors is an integer number (65804400).

Almost surely, 2^515150221 is an apocalyptic number.

It is an amenable number.

515150221 is a deficient number, since it is larger than the sum of its proper divisors (11284979).

515150221 is a wasteful number, since it uses less digits than its factorization.

515150221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6803.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 515150221 is about 22696.9209585794. The cubic root of 515150221 is about 801.6373865245.

The spelling of 515150221 in words is "five hundred fifteen million, one hundred fifty thousand, two hundred twenty-one".