515245981 has 8 divisors (see below), whose sum is σ = 520841664. Its totient is φ = 509664960.

The previous prime is 515245961. The next prime is 515246029. The reversal of 515245981 is 189542515.

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 515245981 - 2⁵ = 515245949 is a prime.

It is a super-2 number, since 2×515245981² = 530956841873304722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515245901) 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 7 ways as a sum of consecutive naturals, for example, 76261 + ... + 82741.

It is an arithmetic number, because the mean of its divisors is an integer number (65105208).

Almost surely, 2^515245981 is an apocalyptic number.

It is an amenable number.

515245981 is a deficient number, since it is larger than the sum of its proper divisors (5595683).

515245981 is a wasteful number, since it uses less digits than its factorization.

515245981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7331.

The product of its digits is 72000, while the sum is 40.

The square root of 515245981 is about 22699.0303977945. The cubic root of 515245981 is about 801.6870549105.

The spelling of 515245981 in words is "five hundred fifteen million, two hundred forty-five thousand, nine hundred eighty-one".