1505440231 has 2 divisors, whose sum is σ = 1505440232. Its totient is φ = 1505440230.

The previous prime is 1505440213. The next prime is 1505440267. The reversal of 1505440231 is 1320445051.

It is a happy number.

Together with previous prime (1505440213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1320445051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1505440231 - 2⁷ = 1505440103 is a prime.

It is a super-2 number, since 2×1505440231² = 4532700578226666722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1505440196 and 1505440205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1505480231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 752720115 + 752720116.

It is an arithmetic number, because the mean of its divisors is an integer number (752720116).

Almost surely, 2^1505440231 is an apocalyptic number.

1505440231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1505440231 is an equidigital number, since it uses as much as digits as its factorization.

1505440231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1505440231 is about 38800.0029768040. The cubic root of 1505440231 is about 1146.0964639654.

Adding to 1505440231 its reverse (1320445051), we get a palindrome (2825885282).

The spelling of 1505440231 in words is "one billion, five hundred five million, four hundred forty thousand, two hundred thirty-one".