42251306399 has 2 divisors, whose sum is σ = 42251306400. Its totient is φ = 42251306398.

The previous prime is 42251306369. The next prime is 42251306417. The reversal of 42251306399 is 99360315224.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42251306399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42251306329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21125653199 + 21125653200.

It is an arithmetic number, because the mean of its divisors is an integer number (21125653200).

Almost surely, 2^42251306399 is an apocalyptic number.

42251306399 is a deficient number, since it is larger than the sum of its proper divisors (1).

42251306399 is an equidigital number, since it uses as much as digits as its factorization.

42251306399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 42251306399 in words is "forty-two billion, two hundred fifty-one million, three hundred six thousand, three hundred ninety-nine".