513525151081997 has 2 divisors, whose sum is σ = 513525151081998. Its totient is φ = 513525151081996.

The previous prime is 513525151081993. The next prime is 513525151082011. The reversal of 513525151081997 is 799180151525315.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 435981875072041 + 77543276009956 = 20880179^2 + 8805866^2 .

It is a cyclic number.

It is not a de Polignac number, because 513525151081997 - 2² = 513525151081993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513525151081993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256762575540998 + 256762575540999.

It is an arithmetic number, because the mean of its divisors is an integer number (256762575540999).

Almost surely, 2^{513525151081997} is an apocalyptic number.

It is an amenable number.

513525151081997 is a deficient number, since it is larger than the sum of its proper divisors (1).

513525151081997 is an equidigital number, since it uses as much as digits as its factorization.

513525151081997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010000, while the sum is 62.

The spelling of 513525151081997 in words is "five hundred thirteen trillion, five hundred twenty-five billion, one hundred fifty-one million, eighty-one thousand, nine hundred ninety-seven".