212306523 has 64 divisors (see below), whose sum is σ = 360847872. Its totient is φ = 109025280.

The previous prime is 212306503. The next prime is 212306531. The reversal of 212306523 is 325603212.

It is not a de Polignac number, because 212306523 - 2¹² = 212302427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212306493 and 212306502.

It is not an unprimeable number, because it can be changed into a prime (212306503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 313261 + ... + 313937.

It is an arithmetic number, because the mean of its divisors is an integer number (5638248).

Almost surely, 2^212306523 is an apocalyptic number.

212306523 is a deficient number, since it is larger than the sum of its proper divisors (148541349).

212306523 is a wasteful number, since it uses less digits than its factorization.

212306523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 212306523 is about 14570.7420195404. The cubic root of 212306523 is about 596.5604338750.

Adding to 212306523 its reverse (325603212), we get a palindrome (537909735).

The spelling of 212306523 in words is "two hundred twelve million, three hundred six thousand, five hundred twenty-three".