1525143319991 has 2 divisors, whose sum is σ = 1525143319992. Its totient is φ = 1525143319990.

The previous prime is 1525143319981. The next prime is 1525143320017. The reversal of 1525143319991 is 1999133415251.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1525143319991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1525143319981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762571659995 + 762571659996.

It is an arithmetic number, because the mean of its divisors is an integer number (762571659996).

Almost surely, 2^{1525143319991} is an apocalyptic number.

1525143319991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525143319991 is an equidigital number, since it uses as much as digits as its factorization.

1525143319991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1312200, while the sum is 53.

The spelling of 1525143319991 in words is "one trillion, five hundred twenty-five billion, one hundred forty-three million, three hundred nineteen thousand, nine hundred ninety-one".