31423043 has 4 divisors (see below), whose sum is σ = 31470408. Its totient is φ = 31375680.

The previous prime is 31423039. The next prime is 31423081. The reversal of 31423043 is 34032413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34032413 = 53 ⋅642121.

It is a cyclic number.

It is not a de Polignac number, because 31423043 - 2² = 31423039 is a prime.

It is a super-3 number, since 3×31423043³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31423033) 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, 22673 + ... + 24018.

It is an arithmetic number, because the mean of its divisors is an integer number (7867602).

Almost surely, 2^31423043 is an apocalyptic number.

31423043 is a deficient number, since it is larger than the sum of its proper divisors (47365).

31423043 is an equidigital number, since it uses as much as digits as its factorization.

31423043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47364.

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

The square root of 31423043 is about 5605.6260132121. The cubic root of 31423043 is about 315.5605806901.

Adding to 31423043 its reverse (34032413), we get a palindrome (65455456).

The spelling of 31423043 in words is "thirty-one million, four hundred twenty-three thousand, forty-three".