2452400221 has 2 divisors, whose sum is σ = 2452400222. Its totient is φ = 2452400220.

The previous prime is 2452400191. The next prime is 2452400257. The reversal of 2452400221 is 1220042542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2355160900 + 97239321 = 48530^2 + 9861^2 .

It is a cyclic number.

It is not a de Polignac number, because 2452400221 - 2⁵ = 2452400189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2452400192 and 2452400201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2452400021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1226200110 + 1226200111.

It is an arithmetic number, because the mean of its divisors is an integer number (1226200111).

Almost surely, 2^2452400221 is an apocalyptic number.

It is an amenable number.

2452400221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2452400221 is an equidigital number, since it uses as much as digits as its factorization.

2452400221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 2452400221 is about 49521.7146411551. The cubic root of 2452400221 is about 1348.5398425736.

Adding to 2452400221 its reverse (1220042542), we get a palindrome (3672442763).

The spelling of 2452400221 in words is "two billion, four hundred fifty-two million, four hundred thousand, two hundred twenty-one".