194215945 has 16 divisors (see below), whose sum is σ = 290567808. Its totient is φ = 121069440.

The previous prime is 194215937. The next prime is 194215951. The reversal of 194215945 is 549512491.

It is not a de Polignac number, because 194215945 - 2³ = 194215937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194215898 and 194215907.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251844 + ... + 252613.

It is an arithmetic number, because the mean of its divisors is an integer number (18160488).

Almost surely, 2^194215945 is an apocalyptic number.

It is an amenable number.

194215945 is a deficient number, since it is larger than the sum of its proper divisors (96351863).

194215945 is a wasteful number, since it uses less digits than its factorization.

194215945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504480.

The product of its digits is 64800, while the sum is 40.

The square root of 194215945 is about 13936.1380948956. The cubic root of 194215945 is about 579.1107508658.

The spelling of 194215945 in words is "one hundred ninety-four million, two hundred fifteen thousand, nine hundred forty-five".