194542215 has 32 divisors (see below), whose sum is σ = 356399616. Its totient is φ = 88767360.

The previous prime is 194542199. The next prime is 194542247. The reversal of 194542215 is 512245491.

It is not a de Polignac number, because 194542215 - 2⁴ = 194542199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68004 + ... + 70806.

It is an arithmetic number, because the mean of its divisors is an integer number (11137488).

Almost surely, 2^194542215 is an apocalyptic number.

194542215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

194542215 is a deficient number, since it is larger than the sum of its proper divisors (161857401).

194542215 is a wasteful number, since it uses less digits than its factorization.

194542215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479.

The product of its digits is 14400, while the sum is 33.

The square root of 194542215 is about 13947.8390799435. The cubic root of 194542215 is about 579.4348587507.

The spelling of 194542215 in words is "one hundred ninety-four million, five hundred forty-two thousand, two hundred fifteen".