2151012449 has 2 divisors, whose sum is σ = 2151012450. Its totient is φ = 2151012448.

The previous prime is 2151012443. The next prime is 2151012503. The reversal of 2151012449 is 9442101512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1613468224 + 537544225 = 40168^2 + 23185^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151012449 - 2⁴ = 2151012433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2151012443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075506224 + 1075506225.

It is an arithmetic number, because the mean of its divisors is an integer number (1075506225).

Almost surely, 2^2151012449 is an apocalyptic number.

It is an amenable number.

2151012449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151012449 is an equidigital number, since it uses as much as digits as its factorization.

2151012449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2151012449 is about 46379.0087108381. The cubic root of 2151012449 is about 1290.8654427330.

The spelling of 2151012449 in words is "two billion, one hundred fifty-one million, twelve thousand, four hundred forty-nine".