15550522120 has 64 divisors (see below), whose sum is σ = 40341006720. Its totient is φ = 5284414464.

The previous prime is 15550522093. The next prime is 15550522121. The reversal of 15550522120 is 2122505551.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (15550522121) 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, 214102 + ... + 277381.

It is an arithmetic number, because the mean of its divisors is an integer number (630328230).

Almost surely, 2^15550522120 is an apocalyptic number.

15550522120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15550522120 is an abundant number, since it is smaller than the sum of its proper divisors (24790484600).

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

15550522120 is a wasteful number, since it uses less digits than its factorization.

15550522120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491614 (or 491610 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 28.

The spelling of 15550522120 in words is "fifteen billion, five hundred fifty million, five hundred twenty-two thousand, one hundred twenty".