212245401 has 8 divisors (see below), whose sum is σ = 283320064. Its totient is φ = 141333840.

The previous prime is 212245387. The next prime is 212245417. The reversal of 212245401 is 104542212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212245401 - 2⁷ = 212245273 is a prime.

It is a super-2 number, since 2×212245401² = 90096220491301602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212245001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37705 + ... + 42966.

It is an arithmetic number, because the mean of its divisors is an integer number (35415008).

Almost surely, 2^212245401 is an apocalyptic number.

It is an amenable number.

212245401 is a deficient number, since it is larger than the sum of its proper divisors (71074663).

212245401 is an equidigital number, since it uses as much as digits as its factorization.

212245401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81551.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 212245401 is about 14568.6444462071. The cubic root of 212245401 is about 596.5031794454.

Adding to 212245401 its reverse (104542212), we get a palindrome (316787613).

It can be divided in two parts, 21 and 2245401, that added together give a palindrome (2245422).

The spelling of 212245401 in words is "two hundred twelve million, two hundred forty-five thousand, four hundred one".