2400331421 has 4 divisors (see below), whose sum is σ = 2483101500. Its totient is φ = 2317561344.

The previous prime is 2400331411. The next prime is 2400331459. The reversal of 2400331421 is 1241330042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1241330042 = 2 ⋅620665021.

It can be written as a sum of positive squares in 2 ways, for example, as 569347321 + 1830984100 = 23861^2 + 42790^2 .

It is a cyclic number.

It is not a de Polignac number, because 2400331421 - 2¹⁴ = 2400315037 is a prime.

It is a super-3 number, since 3×2400331421³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2400331393 and 2400331402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400331411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41384996 + ... + 41385053.

It is an arithmetic number, because the mean of its divisors is an integer number (620775375).

Almost surely, 2^2400331421 is an apocalyptic number.

It is an amenable number.

2400331421 is a deficient number, since it is larger than the sum of its proper divisors (82770079).

2400331421 is an equidigital number, since it uses as much as digits as its factorization.

2400331421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82770078.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2400331421 is about 48993.1772903126. The cubic root of 2400331421 is about 1338.9275262549.

Adding to 2400331421 its reverse (1241330042), we get a palindrome (3641661463).

The spelling of 2400331421 in words is "two billion, four hundred million, three hundred thirty-one thousand, four hundred twenty-one".