10215724392509 has 8 divisors (see below), whose sum is σ = 10503982471680. Its totient is φ = 9928106177616.

The previous prime is 10215724392487. The next prime is 10215724392569. The reversal of 10215724392509 is 90529342751201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10215724392509 is a prime.

It is a super-2 number, since 2×10215724392509² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10215724392569) 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, 159933689 + ... + 159997550.

It is an arithmetic number, because the mean of its divisors is an integer number (1312997808960).

Almost surely, 2^{10215724392509} is an apocalyptic number.

It is an amenable number.

10215724392509 is a deficient number, since it is larger than the sum of its proper divisors (288258079171).

10215724392509 is an equidigital number, since it uses as much as digits as its factorization.

10215724392509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319932139.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 10215724392509 in words is "ten trillion, two hundred fifteen billion, seven hundred twenty-four million, three hundred ninety-two thousand, five hundred nine".