1531253222 has 16 divisors (see below), whose sum is σ = 2329411392. Its totient is φ = 754821480.

The previous prime is 1531253209. The next prime is 1531253233. The reversal of 1531253222 is 2223521351.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1531253191 and 1531253200.

It is a congruent number.

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, 72113 + ... + 90899.

It is an arithmetic number, because the mean of its divisors is an integer number (145588212).

Almost surely, 2^1531253222 is an apocalyptic number.

1531253222 is a deficient number, since it is larger than the sum of its proper divisors (798158170).

1531253222 is a wasteful number, since it uses less digits than its factorization.

1531253222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19363.

The product of its digits is 3600, while the sum is 26.

The square root of 1531253222 is about 39131.2307754305. The cubic root of 1531253222 is about 1152.6098814399.

Adding to 1531253222 its reverse (2223521351), we get a palindrome (3754774573).

The spelling of 1531253222 in words is "one billion, five hundred thirty-one million, two hundred fifty-three thousand, two hundred twenty-two".