312213623 has 12 divisors (see below), whose sum is σ = 326230440. Its totient is φ = 298432512.

The previous prime is 312213611. The next prime is 312213631. The reversal of 312213623 is 326312213.

It is not a de Polignac number, because 312213623 - 2¹⁶ = 312148087 is a prime.

It is a super-3 number, since 3×312213623³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312213683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1214711 + ... + 1214967.

It is an arithmetic number, because the mean of its divisors is an integer number (27185870).

Almost surely, 2^312213623 is an apocalyptic number.

312213623 is a deficient number, since it is larger than the sum of its proper divisors (14016817).

312213623 is an equidigital number, since it uses as much as digits as its factorization.

312213623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 449 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

The square root of 312213623 is about 17669.5677083510. The cubic root of 312213623 is about 678.3970483221.

Adding to 312213623 its reverse (326312213), we get a palindrome (638525836).

The spelling of 312213623 in words is "three hundred twelve million, two hundred thirteen thousand, six hundred twenty-three".