312005530 has 16 divisors (see below), whose sum is σ = 561935304. Its totient is φ = 124729920.

The previous prime is 312005521. The next prime is 312005563. The reversal of 312005530 is 35500213.

It can be written as a sum of positive squares in 4 ways, for example, as 260725609 + 51279921 = 16147^2 + 7161^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312005498 and 312005507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11260 + ... + 27400.

Almost surely, 2^312005530 is an apocalyptic number.

312005530 is a deficient number, since it is larger than the sum of its proper divisors (249929774).

312005530 is a wasteful number, since it uses less digits than its factorization.

312005530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18081.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 312005530 is about 17663.6782692620. The cubic root of 312005530 is about 678.2462957158.

Adding to 312005530 its reverse (35500213), we get a palindrome (347505743).

The spelling of 312005530 in words is "three hundred twelve million, five thousand, five hundred thirty".