1720715151 has 8 divisors (see below), whose sum is σ = 2294916400. Its totient is φ = 1146828672.

The previous prime is 1720715149. The next prime is 1720715159. The reversal of 1720715151 is 1515170271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1720715151 - 2¹ = 1720715149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720715159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65626 + ... + 88023.

It is an arithmetic number, because the mean of its divisors is an integer number (286864550).

Almost surely, 2^1720715151 is an apocalyptic number.

1720715151 is a deficient number, since it is larger than the sum of its proper divisors (574201249).

1720715151 is a wasteful number, since it uses less digits than its factorization.

1720715151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157385.

The product of its (nonzero) digits is 2450, while the sum is 30.

The square root of 1720715151 is about 41481.5037215384. The cubic root of 1720715151 is about 1198.3113171009.

The spelling of 1720715151 in words is "one billion, seven hundred twenty million, seven hundred fifteen thousand, one hundred fifty-one".