15540241001 has 4 divisors (see below), whose sum is σ = 15541209600. Its totient is φ = 15539272404.

The previous prime is 15540240971. The next prime is 15540241021. The reversal of 15540241001 is 10014204551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15540241001 - 2²⁶ = 15473132137 is a prime.

It is a super-2 number, since 2×15540241001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15540241021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459821 + ... + 492458.

It is an arithmetic number, because the mean of its divisors is an integer number (3885302400).

Almost surely, 2^15540241001 is an apocalyptic number.

It is an amenable number.

15540241001 is a deficient number, since it is larger than the sum of its proper divisors (968599).

15540241001 is an equidigital number, since it uses as much as digits as its factorization.

15540241001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968598.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 15540241001 its reverse (10014204551), we get a palindrome (25554445552).

The spelling of 15540241001 in words is "fifteen billion, five hundred forty million, two hundred forty-one thousand, one".