2051365399 has 2 divisors, whose sum is σ = 2051365400. Its totient is φ = 2051365398.

The previous prime is 2051365391. The next prime is 2051365451. The reversal of 2051365399 is 9935631502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2051365399 - 2³ = 2051365391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051365391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025682699 + 1025682700.

It is an arithmetic number, because the mean of its divisors is an integer number (1025682700).

Almost surely, 2^2051365399 is an apocalyptic number.

2051365399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051365399 is an equidigital number, since it uses as much as digits as its factorization.

2051365399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 218700, while the sum is 43.

The square root of 2051365399 is about 45292.0014903294. The cubic root of 2051365399 is about 1270.6160647973.

The spelling of 2051365399 in words is "two billion, fifty-one million, three hundred sixty-five thousand, three hundred ninety-nine".