240213405 has 16 divisors (see below), whose sum is σ = 384534144. Its totient is φ = 128049600.

The previous prime is 240213353. The next prime is 240213427. The reversal of 240213405 is 504312042.

It is not a de Polignac number, because 240213405 - 2¹⁷ = 240082333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53352 + ... + 57678.

It is an arithmetic number, because the mean of its divisors is an integer number (24033384).

Almost surely, 2^240213405 is an apocalyptic number.

It is an amenable number.

240213405 is a deficient number, since it is larger than the sum of its proper divisors (144320739).

240213405 is a wasteful number, since it uses less digits than its factorization.

240213405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8036.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 240213405 is about 15498.8194711726. The cubic root of 240213405 is about 621.6306407769.

Adding to 240213405 its reverse (504312042), we get a palindrome (744525447).

The spelling of 240213405 in words is "two hundred forty million, two hundred thirteen thousand, four hundred five".