212254445 has 16 divisors (see below), whose sum is σ = 274624560. Its totient is φ = 156555264.

The previous prime is 212254433. The next prime is 212254463. The reversal of 212254445 is 544452212.

It can be written as a sum of positive squares in 8 ways, for example, as 4519876 + 207734569 = 2126^2 + 14413^2 .

It is a cyclic number.

It is not a de Polignac number, because 212254445 - 2⁶ = 212254381 is a prime.

It is a Curzon number.

It is a congruent number.

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, 78557 + ... + 81213.

It is an arithmetic number, because the mean of its divisors is an integer number (17164035).

Almost surely, 2^212254445 is an apocalyptic number.

It is an amenable number.

212254445 is a deficient number, since it is larger than the sum of its proper divisors (62370115).

212254445 is a wasteful number, since it uses less digits than its factorization.

212254445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904.

The product of its digits is 12800, while the sum is 29.

The square root of 212254445 is about 14568.9548355399. The cubic root of 212254445 is about 596.5116518679.

The spelling of 212254445 in words is "two hundred twelve million, two hundred fifty-four thousand, four hundred forty-five".