2519392721 has 2 divisors, whose sum is σ = 2519392722. Its totient is φ = 2519392720.

The previous prime is 2519392709. The next prime is 2519392751. The reversal of 2519392721 is 1272939152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2203833025 + 315559696 = 46945^2 + 17764^2 .

It is a cyclic number.

It is not a de Polignac number, because 2519392721 - 2²² = 2515198417 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 (2519392751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1259696360 + 1259696361.

It is an arithmetic number, because the mean of its divisors is an integer number (1259696361).

Almost surely, 2^2519392721 is an apocalyptic number.

It is an amenable number.

2519392721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2519392721 is an equidigital number, since it uses as much as digits as its factorization.

2519392721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 2519392721 is about 50193.5525839724. The cubic root of 2519392721 is about 1360.7091027088.

The spelling of 2519392721 in words is "two billion, five hundred nineteen million, three hundred ninety-two thousand, seven hundred twenty-one".