42997521503 has 2 divisors, whose sum is σ = 42997521504. Its totient is φ = 42997521502.

The previous prime is 42997521499. The next prime is 42997521529. The reversal of 42997521503 is 30512579924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42997521503 - 2² = 42997521499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42997521703) 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, 21498760751 + 21498760752.

It is an arithmetic number, because the mean of its divisors is an integer number (21498760752).

Almost surely, 2^42997521503 is an apocalyptic number.

42997521503 is a deficient number, since it is larger than the sum of its proper divisors (1).

42997521503 is an equidigital number, since it uses as much as digits as its factorization.

42997521503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 42997521503 in words is "forty-two billion, nine hundred ninety-seven million, five hundred twenty-one thousand, five hundred three".