516242761 has 4 divisors (see below), whose sum is σ = 516729472. Its totient is φ = 515756052.

The previous prime is 516242731. The next prime is 516242851. The reversal of 516242761 is 167242615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 516242761 - 2¹³ = 516234569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516242731) 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, 241761 + ... + 243886.

It is an arithmetic number, because the mean of its divisors is an integer number (129182368).

Almost surely, 2^516242761 is an apocalyptic number.

It is an amenable number.

516242761 is a deficient number, since it is larger than the sum of its proper divisors (486711).

516242761 is a wasteful number, since it uses less digits than its factorization.

516242761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486710.

The product of its digits is 20160, while the sum is 34.

The square root of 516242761 is about 22720.9762334280. The cubic root of 516242761 is about 802.2036954384.

The spelling of 516242761 in words is "five hundred sixteen million, two hundred forty-two thousand, seven hundred sixty-one".