31243043 has 4 divisors (see below), whose sum is σ = 33646368. Its totient is φ = 28839720.

The previous prime is 31243013. The next prime is 31243061. The reversal of 31243043 is 34034213.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31243043 - 2⁶ = 31242979 is a prime.

It is a super-2 number, since 2×31243043² = 1952255471799698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31243013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201643 + ... + 1201668.

It is an arithmetic number, because the mean of its divisors is an integer number (8411592).

Almost surely, 2^31243043 is an apocalyptic number.

31243043 is a deficient number, since it is larger than the sum of its proper divisors (2403325).

31243043 is a wasteful number, since it uses less digits than its factorization.

31243043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403324.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 31243043 is about 5589.5476561167. The cubic root of 31243043 is about 314.9568866836.

Adding to 31243043 its reverse (34034213), we get a palindrome (65277256).

The spelling of 31243043 in words is "thirty-one million, two hundred forty-three thousand, forty-three".