152531231 has 2 divisors, whose sum is σ = 152531232. Its totient is φ = 152531230.

The previous prime is 152531219. The next prime is 152531243. The reversal of 152531231 is 132135251.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (152531219) and next prime (152531243).

It is a cyclic number.

It is not a de Polignac number, because 152531231 - 2⁶ = 152531167 is a prime.

It is a super-2 number, since 2×152531231² = 46531552860750722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 152531197 and 152531206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152531201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76265615 + 76265616.

It is an arithmetic number, because the mean of its divisors is an integer number (76265616).

Almost surely, 2^152531231 is an apocalyptic number.

152531231 is a deficient number, since it is larger than the sum of its proper divisors (1).

152531231 is an equidigital number, since it uses as much as digits as its factorization.

152531231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 23.

The square root of 152531231 is about 12350.3534767228. The cubic root of 152531231 is about 534.3013338987.

Adding to 152531231 its reverse (132135251), we get a palindrome (284666482).

The spelling of 152531231 in words is "one hundred fifty-two million, five hundred thirty-one thousand, two hundred thirty-one".