31243461 has 8 divisors (see below), whose sum is σ = 41753760. Its totient is φ = 20781072.

The previous prime is 31243439. The next prime is 31243463. The reversal of 31243461 is 16434213.

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

It is not a de Polignac number, because 31243461 - 2⁹ = 31242949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31243463) 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, 10426 + ... + 13083.

It is an arithmetic number, because the mean of its divisors is an integer number (5219220).

Almost surely, 2^31243461 is an apocalyptic number.

It is an amenable number.

31243461 is a deficient number, since it is larger than the sum of its proper divisors (10510299).

31243461 is a wasteful number, since it uses less digits than its factorization.

31243461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23955.

The product of its digits is 1728, while the sum is 24.

The square root of 31243461 is about 5589.5850472106. The cubic root of 31243461 is about 314.9582912779.

Adding to 31243461 its reverse (16434213), we get a palindrome (47677674).

The spelling of 31243461 in words is "thirty-one million, two hundred forty-three thousand, four hundred sixty-one".