15221434238 has 8 divisors (see below), whose sum is σ = 22851487800. Its totient is φ = 7604271640.

The previous prime is 15221434229. The next prime is 15221434253. The reversal of 15221434238 is 83243412251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 15221434198 and 15221434207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3219788 + ... + 3224511.

It is an arithmetic number, because the mean of its divisors is an integer number (2856435975).

Almost surely, 2^15221434238 is an apocalyptic number.

15221434238 is a deficient number, since it is larger than the sum of its proper divisors (7630053562).

15221434238 is a wasteful number, since it uses less digits than its factorization.

15221434238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6445482.

The product of its digits is 46080, while the sum is 35.

Adding to 15221434238 its reverse (83243412251), we get a palindrome (98464846489).

The spelling of 15221434238 in words is "fifteen billion, two hundred twenty-one million, four hundred thirty-four thousand, two hundred thirty-eight".