312532261 has 2 divisors, whose sum is σ = 312532262. Its totient is φ = 312532260.

The previous prime is 312532249. The next prime is 312532271. The reversal of 312532261 is 162235213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 306915361 + 5616900 = 17519^2 + 2370^2 .

It is a cyclic number.

It is not a de Polignac number, because 312532261 - 2¹⁹ = 312007973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312532271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156266130 + 156266131.

It is an arithmetic number, because the mean of its divisors is an integer number (156266131).

Almost surely, 2^312532261 is an apocalyptic number.

It is an amenable number.

312532261 is a deficient number, since it is larger than the sum of its proper divisors (1).

312532261 is an equidigital number, since it uses as much as digits as its factorization.

312532261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 312532261 is about 17678.5819849896. The cubic root of 312532261 is about 678.6277552990.

Adding to 312532261 its reverse (162235213), we get a palindrome (474767474).

The spelling of 312532261 in words is "three hundred twelve million, five hundred thirty-two thousand, two hundred sixty-one".