2240540421 has 16 divisors (see below), whose sum is σ = 3414822528. Its totient is φ = 1280059200.

The previous prime is 2240540417. The next prime is 2240540441. The reversal of 2240540421 is 1240450422.

It is a happy number.

2240540421 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2240540421 - 2² = 2240540417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2240540391 and 2240540400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2240540441) 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, 186991 + ... + 198611.

It is an arithmetic number, because the mean of its divisors is an integer number (213426408).

Almost surely, 2^2240540421 is an apocalyptic number.

2240540421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2240540421 is a deficient number, since it is larger than the sum of its proper divisors (1174282107).

2240540421 is a wasteful number, since it uses less digits than its factorization.

2240540421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20812.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 2240540421 is about 47334.3471593303. The cubic root of 2240540421 is about 1308.5317390030.

Adding to 2240540421 its reverse (1240450422), we get a palindrome (3480990843).

It can be divided in two parts, 22405 and 40421, that added together give a palindrome (62826).

The spelling of 2240540421 in words is "two billion, two hundred forty million, five hundred forty thousand, four hundred twenty-one".