2251500401 has 2 divisors, whose sum is σ = 2251500402. Its totient is φ = 2251500400.

The previous prime is 2251500389. The next prime is 2251500421. The reversal of 2251500401 is 1040051522.

It is an a-pointer prime, because the next prime (2251500421) can be obtained adding 2251500401 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1287087376 + 964413025 = 35876^2 + 31055^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251500401 - 2¹⁰ = 2251499377 is a prime.

It is not a weakly prime, because it can be changed into another prime (2251500421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125750200 + 1125750201.

It is an arithmetic number, because the mean of its divisors is an integer number (1125750201).

Almost surely, 2^2251500401 is an apocalyptic number.

It is an amenable number.

2251500401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251500401 is an equidigital number, since it uses as much as digits as its factorization.

2251500401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2251500401 is about 47449.9778819759. The cubic root of 2251500401 is about 1310.6619037181.

Adding to 2251500401 its reverse (1040051522), we get a palindrome (3291551923).

The spelling of 2251500401 in words is "two billion, two hundred fifty-one million, five hundred thousand, four hundred one".