212510401 has 4 divisors (see below), whose sum is σ = 213589332. Its totient is φ = 211431472.

The previous prime is 212510381. The next prime is 212510407. The reversal of 212510401 is 104015212.

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 209091600 + 3418801 = 14460^2 + 1849^2 .

It is a cyclic number.

It is not a de Polignac number, because 212510401 - 2⁵ = 212510369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212510407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539170 + ... + 539563.

It is an arithmetic number, because the mean of its divisors is an integer number (53397333).

Almost surely, 2^212510401 is an apocalyptic number.

It is an amenable number.

212510401 is a deficient number, since it is larger than the sum of its proper divisors (1078931).

212510401 is a wasteful number, since it uses less digits than its factorization.

212510401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078930.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 212510401 is about 14577.7364841048. The cubic root of 212510401 is about 596.7513318195.

Adding to 212510401 its reverse (104015212), we get a palindrome (316525613).

The spelling of 212510401 in words is "two hundred twelve million, five hundred ten thousand, four hundred one".