15542243211 has 12 divisors (see below), whose sum is σ = 22778164136. Its totient is φ = 9419541120.

The previous prime is 15542243201. The next prime is 15542243243. The reversal of 15542243211 is 11234224551.

It is not a de Polignac number, because 15542243211 - 2⁵ = 15542243179 is a prime.

It is a super-2 number, since 2×15542243211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15542243201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21407686 + ... + 21408411.

Almost surely, 2^15542243211 is an apocalyptic number.

15542243211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15542243211 is a deficient number, since it is larger than the sum of its proper divisors (7235920925).

15542243211 is a wasteful number, since it uses less digits than its factorization.

15542243211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42816122 (or 42816111 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

Adding to 15542243211 its reverse (11234224551), we get a palindrome (26776467762).

The spelling of 15542243211 in words is "fifteen billion, five hundred forty-two million, two hundred forty-three thousand, two hundred eleven".