525342991 has 2 divisors, whose sum is σ = 525342992. Its totient is φ = 525342990.

The previous prime is 525342973. The next prime is 525343031. The reversal of 525342991 is 199243525.

It is an a-pointer prime, because the next prime (525343031) can be obtained adding 525342991 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 525342991 - 2¹⁷ = 525211919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525342901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262671495 + 262671496.

It is an arithmetic number, because the mean of its divisors is an integer number (262671496).

Almost surely, 2^525342991 is an apocalyptic number.

525342991 is a deficient number, since it is larger than the sum of its proper divisors (1).

525342991 is an equidigital number, since it uses as much as digits as its factorization.

525342991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 40.

The square root of 525342991 is about 22920.3619299522. The cubic root of 525342991 is about 806.8899646108.

The spelling of 525342991 in words is "five hundred twenty-five million, three hundred forty-two thousand, nine hundred ninety-one".