24139231 has 2 divisors, whose sum is σ = 24139232. Its totient is φ = 24139230.

The previous prime is 24139217. The next prime is 24139237. The reversal of 24139231 is 13293142.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 24139231 - 2²¹ = 22042079 is a prime.

It is a super-2 number, since 2×24139231² = 1165404946542722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 24139196 and 24139205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24139237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12069615 + 12069616.

It is an arithmetic number, because the mean of its divisors is an integer number (12069616).

Almost surely, 2^24139231 is an apocalyptic number.

24139231 is a deficient number, since it is larger than the sum of its proper divisors (1).

24139231 is an equidigital number, since it uses as much as digits as its factorization.

24139231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 24139231 is about 4913.1691401783. The cubic root of 24139231 is about 289.0066329101.

The spelling of 24139231 in words is "twenty-four million, one hundred thirty-nine thousand, two hundred thirty-one".