2144578901 has 2 divisors, whose sum is σ = 2144578902. Its totient is φ = 2144578900.

The previous prime is 2144578879. The next prime is 2144578937. The reversal of 2144578901 is 1098754412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1521078001 + 623500900 = 39001^2 + 24970^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144578901 - 2⁶ = 2144578837 is a prime.

It is a super-2 number, since 2×2144578901² = 9198437325228735602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2144578991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072289450 + 1072289451.

It is an arithmetic number, because the mean of its divisors is an integer number (1072289451).

Almost surely, 2^2144578901 is an apocalyptic number.

It is an amenable number.

2144578901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2144578901 is an equidigital number, since it uses as much as digits as its factorization.

2144578901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 2144578901 is about 46309.5983679410. The cubic root of 2144578901 is about 1289.5771907226.

The spelling of 2144578901 in words is "two billion, one hundred forty-four million, five hundred seventy-eight thousand, nine hundred one".