213450405 has 16 divisors (see below), whose sum is σ = 390309504. Its totient is φ = 97577280.

The previous prime is 213450403. The next prime is 213450431. The reversal of 213450405 is 504054312.

It is not a de Polignac number, because 213450405 - 2¹ = 213450403 is a prime.

It is a super-2 number, since 2×213450405² = 91122150789328050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213450401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1016326 + ... + 1016535.

It is an arithmetic number, because the mean of its divisors is an integer number (24394344).

Almost surely, 2^213450405 is an apocalyptic number.

It is an amenable number.

213450405 is a deficient number, since it is larger than the sum of its proper divisors (176859099).

213450405 is a wasteful number, since it uses less digits than its factorization.

213450405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032876.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 213450405 is about 14609.9419916713. The cubic root of 213450405 is about 597.6299140371.

The spelling of 213450405 in words is "two hundred thirteen million, four hundred fifty thousand, four hundred five".