15520242 has 16 divisors (see below), whose sum is σ = 31879872. Its totient is φ = 5033520.

The previous prime is 15520237. The next prime is 15520247. The reversal of 15520242 is 24202551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15520237) and next prime (15520247).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (15520247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34734 + ... + 35177.

It is an arithmetic number, because the mean of its divisors is an integer number (1992492).

Almost surely, 2^15520242 is an apocalyptic number.

15520242 is an abundant number, since it is smaller than the sum of its proper divisors (16359630).

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

15520242 is a wasteful number, since it uses less digits than its factorization.

15520242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69953.

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

The square root of 15520242 is about 3939.5738348202. The cubic root of 15520242 is about 249.4400373705.

Adding to 15520242 its reverse (24202551), we get a palindrome (39722793).

The spelling of 15520242 in words is "fifteen million, five hundred twenty thousand, two hundred forty-two".