523216139 has 2 divisors, whose sum is σ = 523216140. Its totient is φ = 523216138.

The previous prime is 523216081. The next prime is 523216151. The reversal of 523216139 is 931612325.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523216139 is a prime.

It is a super-2 number, since 2×523216139² = 547510256220134642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (523216339) 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 as a sum of consecutive naturals, namely, 261608069 + 261608070.

It is an arithmetic number, because the mean of its divisors is an integer number (261608070).

Almost surely, 2^523216139 is an apocalyptic number.

523216139 is a deficient number, since it is larger than the sum of its proper divisors (1).

523216139 is an equidigital number, since it uses as much as digits as its factorization.

523216139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 32.

The square root of 523216139 is about 22873.9183132230. The cubic root of 523216139 is about 805.7995933591.

The spelling of 523216139 in words is "five hundred twenty-three million, two hundred sixteen thousand, one hundred thirty-nine".