15530222001 has 16 divisors (see below), whose sum is σ = 23733310464. Its totient is φ = 8848833744.

The previous prime is 15530221999. The next prime is 15530222063. The reversal of 15530222001 is 10022203551.

It is not a de Polignac number, because 15530222001 - 2¹ = 15530221999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (15530222501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1058325 + ... + 1072898.

It is an arithmetic number, because the mean of its divisors is an integer number (1483331904).

Almost surely, 2^15530222001 is an apocalyptic number.

It is an amenable number.

15530222001 is a deficient number, since it is larger than the sum of its proper divisors (8203088463).

15530222001 is a wasteful number, since it uses less digits than its factorization.

15530222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131580.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 15530222001 its reverse (10022203551), we get a palindrome (25552425552).

The spelling of 15530222001 in words is "fifteen billion, five hundred thirty million, two hundred twenty-two thousand, one".