194405631 has 16 divisors (see below), whose sum is σ = 298573824. Its totient is φ = 110212704.

The previous prime is 194405611. The next prime is 194405633. The reversal of 194405631 is 136504491.

It is not a de Polignac number, because 194405631 - 2¹⁰ = 194404607 is a prime.

It is a super-2 number, since 2×194405631² = 75587098729016322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 194405592 and 194405601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194405633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33780 + ... + 39113.

It is an arithmetic number, because the mean of its divisors is an integer number (18660864).

Almost surely, 2^194405631 is an apocalyptic number.

194405631 is a deficient number, since it is larger than the sum of its proper divisors (104168193).

194405631 is a wasteful number, since it uses less digits than its factorization.

194405631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73030.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 194405631 is about 13942.9419779328. The cubic root of 194405631 is about 579.2992239920.

The spelling of 194405631 in words is "one hundred ninety-four million, four hundred five thousand, six hundred thirty-one".