2251902581 has 2 divisors, whose sum is σ = 2251902582. Its totient is φ = 2251902580.

The previous prime is 2251902571. The next prime is 2251902593. The reversal of 2251902581 is 1852091522.

2251902581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2249984356 + 1918225 = 47434^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251902581 - 2¹⁸ = 2251640437 is a prime.

It is a super-2 number, since 2×2251902581² = 10142130468628923122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2251902571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125951290 + 1125951291.

It is an arithmetic number, because the mean of its divisors is an integer number (1125951291).

Almost surely, 2^2251902581 is an apocalyptic number.

It is an amenable number.

2251902581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251902581 is an equidigital number, since it uses as much as digits as its factorization.

2251902581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 2251902581 is about 47454.2156293832. The cubic root of 2251902581 is about 1310.7399391800.

The spelling of 2251902581 in words is "two billion, two hundred fifty-one million, nine hundred two thousand, five hundred eighty-one".