1985242205 has 8 divisors (see below), whose sum is σ = 2382823392. Its totient is φ = 1587838608.

The previous prime is 1985242199. The next prime is 1985242213. The reversal of 1985242205 is 5022425891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1985242205 is a prime.

It is a super-2 number, since 2×1985242205² = 7882373225026524050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18419 + ... + 65648.

It is an arithmetic number, because the mean of its divisors is an integer number (297852924).

Almost surely, 2^1985242205 is an apocalyptic number.

It is an amenable number.

1985242205 is a deficient number, since it is larger than the sum of its proper divisors (397581187).

1985242205 is an equidigital number, since it uses as much as digits as its factorization.

1985242205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88795.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 1985242205 is about 44556.0568834362. The cubic root of 1985242205 is about 1256.8144534716.

The spelling of 1985242205 in words is "one billion, nine hundred eighty-five million, two hundred forty-two thousand, two hundred five".