208315942 has 4 divisors (see below), whose sum is σ = 312473916. Its totient is φ = 104157970.

The previous prime is 208315937. The next prime is 208315997. The reversal of 208315942 is 249513802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 249513802 = 2 ⋅124756901.

It is a junction number, because it is equal to n+sod(n) for n = 208315898 and 208315907.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52078984 + ... + 52078987.

It is an arithmetic number, because the mean of its divisors is an integer number (78118479).

Almost surely, 2^208315942 is an apocalyptic number.

208315942 is a deficient number, since it is larger than the sum of its proper divisors (104157974).

208315942 is a wasteful number, since it uses less digits than its factorization.

208315942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104157973.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 208315942 is about 14433.1542637083. The cubic root of 208315942 is about 592.7990545248.

The spelling of 208315942 in words is "two hundred eight million, three hundred fifteen thousand, nine hundred forty-two".