42997521803 has 2 divisors, whose sum is σ = 42997521804. Its totient is φ = 42997521802.

The previous prime is 42997521769. The next prime is 42997521839. The reversal of 42997521803 is 30812579924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42997521803 - 2⁸ = 42997521547 is a prime.

It is not a weakly prime, because it can be changed into another prime (42997521503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21498760901 + 21498760902.

It is an arithmetic number, because the mean of its divisors is an integer number (21498760902).

Almost surely, 2^42997521803 is an apocalyptic number.

42997521803 is a deficient number, since it is larger than the sum of its proper divisors (1).

42997521803 is an equidigital number, since it uses as much as digits as its factorization.

42997521803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 42997521803 in words is "forty-two billion, nine hundred ninety-seven million, five hundred twenty-one thousand, eight hundred three".