15542330220 has 240 divisors, whose sum is σ = 52521047040. Its totient is φ = 3834843264.

The previous prime is 15542330213. The next prime is 15542330227. The reversal of 15542330220 is 2203324551.

It is a happy number.

15542330220 is a `hidden beast` number, since 15 + 5 + 423 + 3 + 0 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (15542330213) and next prime (15542330227).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (15542330227) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1317669 + ... + 1329411.

It is an arithmetic number, because the mean of its divisors is an integer number (218837696).

Almost surely, 2^15542330220 is an apocalyptic number.

15542330220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15542330220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26260523520).

15542330220 is an abundant number, since it is smaller than the sum of its proper divisors (36978716820).

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

15542330220 is a wasteful number, since it uses less digits than its factorization.

15542330220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11826 (or 11815 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 15542330220 its reverse (2203324551), we get a palindrome (17745654771).

The spelling of 15542330220 in words is "fifteen billion, five hundred forty-two million, three hundred thirty thousand, two hundred twenty".