15505542 has 96 divisors (see below), whose sum is σ = 39207168. Its totient is φ = 4390848.

The previous prime is 15505541. The next prime is 15505543. The reversal of 15505542 is 24550551.

It is an interprime number because it is at equal distance from previous prime (15505541) and next prime (15505543).

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15505541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 231393 + ... + 231459.

It is an arithmetic number, because the mean of its divisors is an integer number (408408).

Almost surely, 2^15505542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15505542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19603584).

15505542 is an abundant number, since it is smaller than the sum of its proper divisors (23701626).

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

15505542 is a wasteful number, since it uses less digits than its factorization.

15505542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 15505542 is about 3937.7077088072. The cubic root of 15505542 is about 249.3612601019.

The spelling of 15505542 in words is "fifteen million, five hundred five thousand, five hundred forty-two".