195215478 has 32 divisors (see below), whose sum is σ = 406095360. Its totient is φ = 62506080.

The previous prime is 195215459. The next prime is 195215491. The reversal of 195215478 is 874512591.

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 in 15 ways as a sum of consecutive naturals, for example, 11973 + ... + 23103.

It is an arithmetic number, because the mean of its divisors is an integer number (12690480).

Almost surely, 2^195215478 is an apocalyptic number.

195215478 is an abundant number, since it is smaller than the sum of its proper divisors (210879882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195215478 is a wasteful number, since it uses less digits than its factorization.

195215478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11252.

The product of its digits is 100800, while the sum is 42.

The square root of 195215478 is about 13971.9532635920. The cubic root of 195215478 is about 580.1025165598.

The spelling of 195215478 in words is "one hundred ninety-five million, two hundred fifteen thousand, four hundred seventy-eight".