213412545 has 24 divisors (see below), whose sum is σ = 370492200. Its totient is φ = 113642496.

The previous prime is 213412531. The next prime is 213412547. The reversal of 213412545 is 545214312.

It can be written as a sum of positive squares in 4 ways, for example, as 18558864 + 194853681 = 4308^2 + 13959^2 .

It is not a de Polignac number, because 213412545 - 2¹³ = 213404353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213412547) 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 23 ways as a sum of consecutive naturals, for example, 28561 + ... + 35249.

It is an arithmetic number, because the mean of its divisors is an integer number (15437175).

Almost surely, 2^213412545 is an apocalyptic number.

It is an amenable number.

213412545 is a deficient number, since it is larger than the sum of its proper divisors (157079655).

213412545 is a wasteful number, since it uses less digits than its factorization.

213412545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7409 (or 7406 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 213412545 is about 14608.6462411820. The cubic root of 213412545 is about 597.5945777936.

Adding to 213412545 its reverse (545214312), we get a palindrome (758626857).

The spelling of 213412545 in words is "two hundred thirteen million, four hundred twelve thousand, five hundred forty-five".