212666469 has 16 divisors (see below), whose sum is σ = 287074944. Its totient is φ = 140025600.

The previous prime is 212666423. The next prime is 212666537. The reversal of 212666469 is 964666212.

It is not a de Polignac number, because 212666469 - 2¹⁶ = 212600933 is a prime.

It is a super-2 number, since 2×212666469² = 90454054073855922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212666469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212665469) 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, 160329 + ... + 161649.

It is an arithmetic number, because the mean of its divisors is an integer number (17942184).

Almost surely, 2^212666469 is an apocalyptic number.

It is an amenable number.

212666469 is a deficient number, since it is larger than the sum of its proper divisors (74408475).

212666469 is a wasteful number, since it uses less digits than its factorization.

212666469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948.

The product of its digits is 186624, while the sum is 42.

The square root of 212666469 is about 14583.0884588965. The cubic root of 212666469 is about 596.8973811368.

The spelling of 212666469 in words is "two hundred twelve million, six hundred sixty-six thousand, four hundred sixty-nine".