523145191 has 2 divisors, whose sum is σ = 523145192. Its totient is φ = 523145190.

The previous prime is 523145177. The next prime is 523145201. The reversal of 523145191 is 191541325.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 523145191 - 2⁵ = 523145159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523145101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261572595 + 261572596.

It is an arithmetic number, because the mean of its divisors is an integer number (261572596).

Almost surely, 2^523145191 is an apocalyptic number.

523145191 is a deficient number, since it is larger than the sum of its proper divisors (1).

523145191 is an equidigital number, since it uses as much as digits as its factorization.

523145191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 31.

The square root of 523145191 is about 22872.3674113547. The cubic root of 523145191 is about 805.7631696268.

The spelling of 523145191 in words is "five hundred twenty-three million, one hundred forty-five thousand, one hundred ninety-one".