516121911 has 12 divisors (see below), whose sum is σ = 758145960. Its totient is φ = 338249040.

The previous prime is 516121891. The next prime is 516121937. The reversal of 516121911 is 119121615.

It is not a de Polignac number, because 516121911 - 2⁶ = 516121847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516122911) 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 11 ways as a sum of consecutive naturals, for example, 485460 + ... + 486521.

It is an arithmetic number, because the mean of its divisors is an integer number (63178830).

Almost surely, 2^516121911 is an apocalyptic number.

516121911 is a deficient number, since it is larger than the sum of its proper divisors (242024049).

516121911 is a wasteful number, since it uses less digits than its factorization.

516121911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972046 (or 972043 counting only the distinct ones).

The product of its digits is 540, while the sum is 27.

The square root of 516121911 is about 22718.3166409838. The cubic root of 516121911 is about 802.1410931836.

It can be divided in two parts, 5161 and 21911, that added together give a palindrome (27072).

The spelling of 516121911 in words is "five hundred sixteen million, one hundred twenty-one thousand, nine hundred eleven".