212242465 has 4 divisors (see below), whose sum is σ = 254690964. Its totient is φ = 169793968.

The previous prime is 212242451. The next prime is 212242469. The reversal of 212242465 is 564242212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 154952704 + 57289761 = 12448^2 + 7569^2 .

It is a cyclic number.

It is not a de Polignac number, because 212242465 - 2¹¹ = 212240417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212242469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21224242 + ... + 21224251.

It is an arithmetic number, because the mean of its divisors is an integer number (63672741).

Almost surely, 2^212242465 is an apocalyptic number.

It is an amenable number.

212242465 is a deficient number, since it is larger than the sum of its proper divisors (42448499).

212242465 is an equidigital number, since it uses as much as digits as its factorization.

212242465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42448498.

The product of its digits is 7680, while the sum is 28.

The square root of 212242465 is about 14568.5436815078. The cubic root of 212242465 is about 596.5004289478.

Adding to 212242465 its reverse (564242212), we get a palindrome (776484677).

The spelling of 212242465 in words is "two hundred twelve million, two hundred forty-two thousand, four hundred sixty-five".