212521413 has 16 divisors (see below), whose sum is σ = 305700416. Its totient is φ = 130550400.

The previous prime is 212521411. The next prime is 212521423. The reversal of 212521413 is 314125212.

212521413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212521413 - 2¹ = 212521411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212521413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212521411) 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, 18906 + ... + 27972.

It is an arithmetic number, because the mean of its divisors is an integer number (19106276).

Almost surely, 2^212521413 is an apocalyptic number.

It is an amenable number.

212521413 is a deficient number, since it is larger than the sum of its proper divisors (93179003).

212521413 is a wasteful number, since it uses less digits than its factorization.

212521413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9684.

The product of its digits is 480, while the sum is 21.

The square root of 212521413 is about 14578.1141784526. The cubic root of 212521413 is about 596.7616392556.

Adding to 212521413 its reverse (314125212), we get a palindrome (526646625).

The spelling of 212521413 in words is "two hundred twelve million, five hundred twenty-one thousand, four hundred thirteen".