157809422 has 4 divisors (see below), whose sum is σ = 236714136. Its totient is φ = 78904710.

The previous prime is 157809413. The next prime is 157809433. The reversal of 157809422 is 224908751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224908751 = 31 ⋅7255121.

It is a congruent number.

It is an unprimeable number.

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, 39452354 + ... + 39452357.

It is an arithmetic number, because the mean of its divisors is an integer number (59178534).

Almost surely, 2^157809422 is an apocalyptic number.

157809422 is a deficient number, since it is larger than the sum of its proper divisors (78904714).

157809422 is an equidigital number, since it uses as much as digits as its factorization.

157809422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78904713.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 157809422 is about 12562.2220168249. Note that the first 3 decimals coincide. The cubic root of 157809422 is about 540.3945698768.

The spelling of 157809422 in words is "one hundred fifty-seven million, eight hundred nine thousand, four hundred twenty-two".