42145250513 has 2 divisors, whose sum is σ = 42145250514. Its totient is φ = 42145250512.

The previous prime is 42145250509. The next prime is 42145250557. The reversal of 42145250513 is 31505254124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34015162624 + 8130087889 = 184432^2 + 90167^2 .

It is a cyclic number.

It is not a de Polignac number, because 42145250513 - 2² = 42145250509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42145250513.

It is not a weakly prime, because it can be changed into another prime (42145250503) 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, 21072625256 + 21072625257.

It is an arithmetic number, because the mean of its divisors is an integer number (21072625257).

Almost surely, 2^42145250513 is an apocalyptic number.

It is an amenable number.

42145250513 is a deficient number, since it is larger than the sum of its proper divisors (1).

42145250513 is an equidigital number, since it uses as much as digits as its factorization.

42145250513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 42145250513 in words is "forty-two billion, one hundred forty-five million, two hundred fifty thousand, five hundred thirteen".