212540413 has 4 divisors (see below), whose sum is σ = 214526880. Its totient is φ = 210553948.

The previous prime is 212540411. The next prime is 212540423. The reversal of 212540413 is 314045212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212540413 - 2¹ = 212540411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212540411) 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, 993073 + ... + 993286.

It is an arithmetic number, because the mean of its divisors is an integer number (53631720).

Almost surely, 2^212540413 is an apocalyptic number.

It is an amenable number.

212540413 is a deficient number, since it is larger than the sum of its proper divisors (1986467).

212540413 is a wasteful number, since it uses less digits than its factorization.

212540413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986466.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 212540413 is about 14578.7658256795. The cubic root of 212540413 is about 596.7794227707.

Adding to 212540413 its reverse (314045212), we get a palindrome (526585625).

The spelling of 212540413 in words is "two hundred twelve million, five hundred forty thousand, four hundred thirteen".