1301532231 has 4 divisors (see below), whose sum is σ = 1735376312. Its totient is φ = 867688152.

The previous prime is 1301532227. The next prime is 1301532247. The reversal of 1301532231 is 1322351031.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1301532231 - 2² = 1301532227 is a prime.

It is a super-2 number, since 2×1301532231² = 3387972296663674722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1301532198 and 1301532207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301530231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216922036 + ... + 216922041.

It is an arithmetic number, because the mean of its divisors is an integer number (433844078).

Almost surely, 2^1301532231 is an apocalyptic number.

1301532231 is a deficient number, since it is larger than the sum of its proper divisors (433844081).

1301532231 is an equidigital number, since it uses as much as digits as its factorization.

1301532231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433844080.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1301532231 is about 36076.7547182393. The cubic root of 1301532231 is about 1091.8215008660.

Adding to 1301532231 its reverse (1322351031), we get a palindrome (2623883262).

The spelling of 1301532231 in words is "one billion, three hundred one million, five hundred thirty-two thousand, two hundred thirty-one".