349131631 has 8 divisors (see below), whose sum is σ = 368839280. Its totient is φ = 329557248.

The previous prime is 349131613. The next prime is 349131647. The reversal of 349131631 is 136131943.

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

It is a cyclic number.

It is not a de Polignac number, because 349131631 - 2¹⁷ = 349000559 is a prime.

It is a super-2 number, since 2×349131631² = 243785791529440322, 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 = 349131593 and 349131602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349131611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27906 + ... + 38431.

It is an arithmetic number, because the mean of its divisors is an integer number (46104910).

Almost surely, 2^349131631 is an apocalyptic number.

349131631 is a deficient number, since it is larger than the sum of its proper divisors (19707649).

349131631 is a wasteful number, since it uses less digits than its factorization.

349131631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66633.

The product of its digits is 5832, while the sum is 31.

The square root of 349131631 is about 18685.0643830842. The cubic root of 349131631 is about 704.1465661773.

The spelling of 349131631 in words is "three hundred forty-nine million, one hundred thirty-one thousand, six hundred thirty-one".