513919655971 has 2 divisors, whose sum is σ = 513919655972. Its totient is φ = 513919655970.

The previous prime is 513919655933. The next prime is 513919656007. The reversal of 513919655971 is 179556919315.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513919655971 is a prime.

It is a super-2 number, since 2×513919655971² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (513919655911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256959827985 + 256959827986.

It is an arithmetic number, because the mean of its divisors is an integer number (256959827986).

Almost surely, 2^513919655971 is an apocalyptic number.

513919655971 is a deficient number, since it is larger than the sum of its proper divisors (1).

513919655971 is an equidigital number, since it uses as much as digits as its factorization.

513919655971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11481750, while the sum is 61.

The spelling of 513919655971 in words is "five hundred thirteen billion, nine hundred nineteen million, six hundred fifty-five thousand, nine hundred seventy-one".