31243406 has 8 divisors (see below), whose sum is σ = 46942680. Its totient is φ = 15595848.

The previous prime is 31243393. The next prime is 31243417. The reversal of 31243406 is 60434213.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11381 + ... + 13856.

It is an arithmetic number, because the mean of its divisors is an integer number (5867835).

Almost surely, 2^31243406 is an apocalyptic number.

31243406 is a deficient number, since it is larger than the sum of its proper divisors (15699274).

31243406 is a wasteful number, since it uses less digits than its factorization.

31243406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25858.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 31243406 is about 5589.5801273441. The cubic root of 31243406 is about 314.9581064635.

Adding to 31243406 its reverse (60434213), we get a palindrome (91677619).

The spelling of 31243406 in words is "thirty-one million, two hundred forty-three thousand, four hundred six".