15240220535 has 4 divisors (see below), whose sum is σ = 18288264648. Its totient is φ = 12192176424.

The previous prime is 15240220493. The next prime is 15240220579. The reversal of 15240220535 is 53502204251.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15240220535 - 2¹⁴ = 15240204151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15240220498 and 15240220507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1524022049 + ... + 1524022058.

It is an arithmetic number, because the mean of its divisors is an integer number (4572066162).

Almost surely, 2^15240220535 is an apocalyptic number.

15240220535 is a deficient number, since it is larger than the sum of its proper divisors (3048044113).

15240220535 is an equidigital number, since it uses as much as digits as its factorization.

15240220535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048044112.

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 15240220535 its reverse (53502204251), we get a palindrome (68742424786).

The spelling of 15240220535 in words is "fifteen billion, two hundred forty million, two hundred twenty thousand, five hundred thirty-five".