240421311 has 16 divisors (see below), whose sum is σ = 383578720. Its totient is φ = 147951360.

The previous prime is 240421297. The next prime is 240421331. The reversal of 240421311 is 113124042.

240421311 is a `hidden beast` number, since 240 + 421 + 3 + 1 + 1 = 666.

It is not a de Polignac number, because 240421311 - 2⁷ = 240421183 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 (240421331) 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, 342130 + ... + 342831.

It is an arithmetic number, because the mean of its divisors is an integer number (23973670).

Almost surely, 2^240421311 is an apocalyptic number.

240421311 is a deficient number, since it is larger than the sum of its proper divisors (143157409).

240421311 is a wasteful number, since it uses less digits than its factorization.

240421311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684983 (or 684977 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 240421311 is about 15505.5251765298. The cubic root of 240421311 is about 621.8099306209.

Adding to 240421311 its reverse (113124042), we get a palindrome (353545353).

The spelling of 240421311 in words is "two hundred forty million, four hundred twenty-one thousand, three hundred eleven".