15502242 has 32 divisors (see below), whose sum is σ = 35868672. Its totient is φ = 4374864.

The previous prime is 15502241. The next prime is 15502247. The reversal of 15502242 is 24220551.

It is a happy number.

15502242 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

15502242 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (15502241) 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, 1263 + ... + 5709.

It is an arithmetic number, because the mean of its divisors is an integer number (1120896).

Almost surely, 2^15502242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15502242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17934336).

15502242 is an abundant number, since it is smaller than the sum of its proper divisors (20366430).

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

15502242 is a wasteful number, since it uses less digits than its factorization.

15502242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4542.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 15502242 is about 3937.2886609950. The cubic root of 15502242 is about 249.3435685663.

Adding to 15502242 its reverse (24220551), we get a palindrome (39722793).

The spelling of 15502242 in words is "fifteen million, five hundred two thousand, two hundred forty-two".