15231242 has 16 divisors (see below), whose sum is σ = 24675840. Its totient is φ = 7009392.

The previous prime is 15231241. The next prime is 15231253. The reversal of 15231242 is 24213251.

It is not an unprimeable number, because it can be changed into a prime (15231241) 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, 11843 + ... + 13065.

It is an arithmetic number, because the mean of its divisors is an integer number (1542240).

Almost surely, 2^15231242 is an apocalyptic number.

15231242 is a deficient number, since it is larger than the sum of its proper divisors (9444598).

15231242 is a wasteful number, since it uses less digits than its factorization.

15231242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717.

The product of its digits is 480, while the sum is 20.

The square root of 15231242 is about 3902.7223831577. The cubic root of 15231242 is about 247.8820654140.

Adding to 15231242 its reverse (24213251), we get a palindrome (39444493).

Subtracting 15231242 from its reverse (24213251), we obtain a square (8982009 = 2997²).

The spelling of 15231242 in words is "fifteen million, two hundred thirty-one thousand, two hundred forty-two".