42185755247 has 4 divisors (see below), whose sum is σ = 42186413640. Its totient is φ = 42185096856.

The previous prime is 42185755231. The next prime is 42185755253. The reversal of 42185755247 is 74255758124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42185755247 - 2⁴ = 42185755231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42185755195 and 42185755204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42185755207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221297 + ... + 365162.

It is an arithmetic number, because the mean of its divisors is an integer number (10546603410).

Almost surely, 2^42185755247 is an apocalyptic number.

42185755247 is a deficient number, since it is larger than the sum of its proper divisors (658393).

42185755247 is an equidigital number, since it uses as much as digits as its factorization.

42185755247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658392.

The product of its digits is 3136000, while the sum is 50.

The spelling of 42185755247 in words is "forty-two billion, one hundred eighty-five million, seven hundred fifty-five thousand, two hundred forty-seven".