15542242220 has 48 divisors (see below), whose sum is σ = 33359413248. Its totient is φ = 6081001920.

The previous prime is 15542242207. The next prime is 15542242229. The reversal of 15542242220 is 2224224551.

It is a happy number.

It is a super-2 number, since 2×15542242220² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15542242229) 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, 137249 + ... + 223431.

It is an arithmetic number, because the mean of its divisors is an integer number (694987776).

Almost surely, 2^15542242220 is an apocalyptic number.

15542242220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15542242220 is an abundant number, since it is smaller than the sum of its proper divisors (17817171028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15542242220 is a wasteful number, since it uses less digits than its factorization.

15542242220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86390 (or 86388 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 15542242220 its reverse (2224224551), we get a palindrome (17766466771).

The spelling of 15542242220 in words is "fifteen billion, five hundred forty-two million, two hundred forty-two thousand, two hundred twenty".