1051720519 has 2 divisors, whose sum is σ = 1051720520. Its totient is φ = 1051720518.

The previous prime is 1051720513. The next prime is 1051720529. The reversal of 1051720519 is 9150271501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1051720519 - 2⁷ = 1051720391 is a prime.

It is a super-2 number, since 2×1051720519² = 2212232100171258722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1051720513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525860259 + 525860260.

It is an arithmetic number, because the mean of its divisors is an integer number (525860260).

Almost surely, 2^1051720519 is an apocalyptic number.

1051720519 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051720519 is an equidigital number, since it uses as much as digits as its factorization.

1051720519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3150, while the sum is 31.

The square root of 1051720519 is about 32430.2408100834. The cubic root of 1051720519 is about 1016.9512060092.

The spelling of 1051720519 in words is "one billion, fifty-one million, seven hundred twenty thousand, five hundred nineteen".