1531116226 has 16 divisors (see below), whose sum is σ = 2409631488. Its totient is φ = 728715600.

The previous prime is 1531116211. The next prime is 1531116239. The reversal of 1531116226 is 6226111351.

It is a junction number, because it is equal to n+sod(n) for n = 1531116194 and 1531116203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198640 + ... + 206203.

It is an arithmetic number, because the mean of its divisors is an integer number (150601968).

Almost surely, 2^1531116226 is an apocalyptic number.

1531116226 is a deficient number, since it is larger than the sum of its proper divisors (878515262).

1531116226 is a wasteful number, since it uses less digits than its factorization.

1531116226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404937.

The product of its digits is 2160, while the sum is 28.

The square root of 1531116226 is about 39129.4802674403. The cubic root of 1531116226 is about 1152.5755070573.

Adding to 1531116226 its reverse (6226111351), we get a palindrome (7757227577).

The spelling of 1531116226 in words is "one billion, five hundred thirty-one million, one hundred sixteen thousand, two hundred twenty-six".