2251378291 has 2 divisors, whose sum is σ = 2251378292. Its totient is φ = 2251378290.

The previous prime is 2251378279. The next prime is 2251378307. The reversal of 2251378291 is 1928731522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2251378291 - 2¹¹ = 2251376243 is a prime.

It is not a weakly prime, because it can be changed into another prime (2251378201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125689145 + 1125689146.

It is an arithmetic number, because the mean of its divisors is an integer number (1125689146).

Almost surely, 2^2251378291 is an apocalyptic number.

2251378291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251378291 is an equidigital number, since it uses as much as digits as its factorization.

2251378291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 2251378291 is about 47448.6911410631. The cubic root of 2251378291 is about 1310.6382087311.

The spelling of 2251378291 in words is "two billion, two hundred fifty-one million, three hundred seventy-eight thousand, two hundred ninety-one".