145512331 has 2 divisors, whose sum is σ = 145512332. Its totient is φ = 145512330.

The previous prime is 145512313. The next prime is 145512337. The reversal of 145512331 is 133215541.

It is a happy number.

145512331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (145512313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145512331 - 2⁹ = 145511819 is a prime.

It is a super-2 number, since 2×145512331² = 42347676946107122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145512296 and 145512305.

It is not a weakly prime, because it can be changed into another prime (145512337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72756165 + 72756166.

It is an arithmetic number, because the mean of its divisors is an integer number (72756166).

Almost surely, 2^145512331 is an apocalyptic number.

145512331 is a deficient number, since it is larger than the sum of its proper divisors (1).

145512331 is an equidigital number, since it uses as much as digits as its factorization.

145512331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 145512331 is about 12062.8492073805. The cubic root of 145512331 is about 525.9768130131.

Adding to 145512331 its reverse (133215541), we get a palindrome (278727872).

The spelling of 145512331 in words is "one hundred forty-five million, five hundred twelve thousand, three hundred thirty-one".