212668505 has 16 divisors (see below), whose sum is σ = 291945600. Its totient is φ = 145686912.

The previous prime is 212668459. The next prime is 212668537. The reversal of 212668505 is 505866212.

It is not a de Polignac number, because 212668505 - 2²⁶ = 145559641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43421 + ... + 48069.

It is an arithmetic number, because the mean of its divisors is an integer number (18246600).

Almost surely, 2^212668505 is an apocalyptic number.

It is an amenable number.

212668505 is a deficient number, since it is larger than the sum of its proper divisors (79277095).

212668505 is a wasteful number, since it uses less digits than its factorization.

212668505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 212668505 is about 14583.1582656159. The cubic root of 212668505 is about 596.8992859649.

The spelling of 212668505 in words is "two hundred twelve million, six hundred sixty-eight thousand, five hundred five".