194135431 has 8 divisors (see below), whose sum is σ = 223905440. Its totient is φ = 164874528.

The previous prime is 194135413. The next prime is 194135443. The reversal of 194135431 is 134531491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 194135431 - 2⁵ = 194135399 is a prime.

It is a super-2 number, since 2×194135431² = 75377131139111522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194135393 and 194135402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194135401) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 126456 + ... + 127981.

It is an arithmetic number, because the mean of its divisors is an integer number (27988180).

Almost surely, 2^194135431 is an apocalyptic number.

194135431 is a deficient number, since it is larger than the sum of its proper divisors (29770009).

194135431 is a wasteful number, since it uses less digits than its factorization.

194135431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254553.

The product of its digits is 6480, while the sum is 31.

The square root of 194135431 is about 13933.2491185653. The cubic root of 194135431 is about 579.0307145818.

The spelling of 194135431 in words is "one hundred ninety-four million, one hundred thirty-five thousand, four hundred thirty-one".