312216526 has 12 divisors (see below), whose sum is σ = 497494728. Its totient is φ = 146925152.

The previous prime is 312216521. The next prime is 312216529. The reversal of 312216526 is 625612213.

It is a junction number, because it is equal to n+sod(n) for n = 312216494 and 312216503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312216521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 269506 + ... + 270661.

It is an arithmetic number, because the mean of its divisors is an integer number (41457894).

Almost surely, 2^312216526 is an apocalyptic number.

312216526 is a deficient number, since it is larger than the sum of its proper divisors (185278202).

312216526 is a wasteful number, since it uses less digits than its factorization.

312216526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540203 (or 540186 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 312216526 is about 17669.6498550481. The cubic root of 312216526 is about 678.3991509215.

Adding to 312216526 its reverse (625612213), we get a palindrome (937828739).

The spelling of 312216526 in words is "three hundred twelve million, two hundred sixteen thousand, five hundred twenty-six".