194881051 has 4 divisors (see below), whose sum is σ = 196890232. Its totient is φ = 192871872.

The previous prime is 194881021. The next prime is 194881069. The reversal of 194881051 is 150188491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150188491 = 2777 ⋅54083.

It is a cyclic number.

It is not a de Polignac number, because 194881051 - 2⁷ = 194880923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194881051.

It is not an unprimeable number, because it can be changed into a prime (194881021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004445 + ... + 1004638.

It is an arithmetic number, because the mean of its divisors is an integer number (49222558).

Almost surely, 2^194881051 is an apocalyptic number.

194881051 is a deficient number, since it is larger than the sum of its proper divisors (2009181).

194881051 is an equidigital number, since it uses as much as digits as its factorization.

194881051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009180.

The product of its (nonzero) digits is 11520, while the sum is 37.

The square root of 194881051 is about 13959.9803366624. The cubic root of 194881051 is about 579.7710660100.

The spelling of 194881051 in words is "one hundred ninety-four million, eight hundred eighty-one thousand, fifty-one".