31006665349 has 8 divisors (see below), whose sum is σ = 33827342400. Its totient is φ = 28186303200.

The previous prime is 31006665337. The next prime is 31006665367. The reversal of 31006665349 is 94356660013.

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

It is not a de Polignac number, because 31006665349 - 2¹¹ = 31006663301 is a prime.

It is a super-2 number, since 2×31006665349² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31006668349) 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, 158169 + ... + 295009.

It is an arithmetic number, because the mean of its divisors is an integer number (4228417800).

Almost surely, 2^31006665349 is an apocalyptic number.

It is an amenable number.

31006665349 is a deficient number, since it is larger than the sum of its proper divisors (2820677051).

31006665349 is a wasteful number, since it uses less digits than its factorization.

31006665349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157451.

The product of its (nonzero) digits is 349920, while the sum is 43.

The spelling of 31006665349 in words is "thirty-one billion, six million, six hundred sixty-five thousand, three hundred forty-nine".