194451151 has 16 divisors (see below), whose sum is σ = 212012640. Its totient is φ = 177617920.

The previous prime is 194451139. The next prime is 194451161. The reversal of 194451151 is 151154491.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 194451151 - 2¹³ = 194442959 is a prime.

It is a super-2 number, since 2×194451151² = 75622500250449602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194451121) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 157605 + ... + 158833.

It is an arithmetic number, because the mean of its divisors is an integer number (13250790).

Almost surely, 2^194451151 is an apocalyptic number.

194451151 is a deficient number, since it is larger than the sum of its proper divisors (17561489).

194451151 is a wasteful number, since it uses less digits than its factorization.

194451151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514.

The product of its digits is 3600, while the sum is 31.

The square root of 194451151 is about 13944.5742495065. The cubic root of 194451151 is about 579.3444346900.

The spelling of 194451151 in words is "one hundred ninety-four million, four hundred fifty-one thousand, one hundred fifty-one".