312320530 has 16 divisors (see below), whose sum is σ = 562408344. Its totient is φ = 124876800.

The previous prime is 312320527. The next prime is 312320531. The reversal of 312320530 is 35023213.

It can be written as a sum of positive squares in 4 ways, for example, as 311840281 + 480249 = 17659^2 + 693^2 .

It is a super-2 number, since 2×312320530² = 195088226918961800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 312320498 and 312320507.

It is not an unprimeable number, because it can be changed into a prime (312320531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27730 + ... + 37330.

Almost surely, 2^312320530 is an apocalyptic number.

312320530 is a deficient number, since it is larger than the sum of its proper divisors (250087814).

312320530 is a wasteful number, since it uses less digits than its factorization.

312320530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12861.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 312320530 is about 17672.5926224762. The cubic root of 312320530 is about 678.4744708639.

Adding to 312320530 its reverse (35023213), we get a palindrome (347343743).

It can be divided in two parts, 3123 and 20530, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 312320530 in words is "three hundred twelve million, three hundred twenty thousand, five hundred thirty".