31012043 has 2 divisors, whose sum is σ = 31012044. Its totient is φ = 31012042.

The previous prime is 31012039. The next prime is 31012099. The reversal of 31012043 is 34021013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31012043 - 2² = 31012039 is a prime.

It is a super-2 number, since 2×31012043² = 1923493622067698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31012013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506021 + 15506022.

It is an arithmetic number, because the mean of its divisors is an integer number (15506022).

Almost surely, 2^31012043 is an apocalyptic number.

31012043 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012043 is an equidigital number, since it uses as much as digits as its factorization.

31012043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31012043 is about 5568.8457511409. The cubic root of 31012043 is about 314.1787391631.

Adding to 31012043 its reverse (34021013), we get a palindrome (65033056).

The spelling of 31012043 in words is "thirty-one million, twelve thousand, forty-three".