212812623 has 16 divisors (see below), whose sum is σ = 315737440. Its totient is φ = 141668352.

The previous prime is 212812603. The next prime is 212812651. The reversal of 212812623 is 326218212.

212812623 is a `hidden beast` number, since 2 + 1 + 28 + 12 + 623 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-212812623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212812603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14415 + ... + 25167.

It is an arithmetic number, because the mean of its divisors is an integer number (19733590).

Almost surely, 2^212812623 is an apocalyptic number.

212812623 is a deficient number, since it is larger than the sum of its proper divisors (102924817).

212812623 is a wasteful number, since it uses less digits than its factorization.

212812623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11495 (or 11489 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 212812623 is about 14588.0986766611. The cubic root of 212812623 is about 597.0340881018.

The spelling of 212812623 in words is "two hundred twelve million, eight hundred twelve thousand, six hundred twenty-three".