15541252001 has 32 divisors (see below), whose sum is σ = 17385062400. Its totient is φ = 13775287680.

The previous prime is 15541251991. The next prime is 15541252033. The reversal of 15541252001 is 10025214551.

It is not a de Polignac number, because 15541252001 - 2¹⁸ = 15540989857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15541252061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29715326 + ... + 29715848.

It is an arithmetic number, because the mean of its divisors is an integer number (543283200).

Almost surely, 2^15541252001 is an apocalyptic number.

15541252001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15541252001 is a deficient number, since it is larger than the sum of its proper divisors (1843810399).

15541252001 is a wasteful number, since it uses less digits than its factorization.

15541252001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 15541252001 its reverse (10025214551), we get a palindrome (25566466552).

The spelling of 15541252001 in words is "fifteen billion, five hundred forty-one million, two hundred fifty-two thousand, one".