137443231 has 2 divisors, whose sum is σ = 137443232. Its totient is φ = 137443230.

The previous prime is 137443217. The next prime is 137443247. The reversal of 137443231 is 132344731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137443231 - 2⁵ = 137443199 is a prime.

It is a super-2 number, since 2×137443231² = 37781283495438722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137443231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137443261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68721615 + 68721616.

It is an arithmetic number, because the mean of its divisors is an integer number (68721616).

Almost surely, 2^137443231 is an apocalyptic number.

137443231 is a deficient number, since it is larger than the sum of its proper divisors (1).

137443231 is an equidigital number, since it uses as much as digits as its factorization.

137443231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 28.

The square root of 137443231 is about 11723.6185113641. The cubic root of 137443231 is about 516.0690158172.

Adding to 137443231 its reverse (132344731), we get a palindrome (269787962).

The spelling of 137443231 in words is "one hundred thirty-seven million, four hundred forty-three thousand, two hundred thirty-one".