1531222 has 32 divisors (see below), whose sum is σ = 2928384. Its totient is φ = 583200.

The previous prime is 1531217. The next prime is 1531253. The reversal of 1531222 is 2221351.

It is a junction number, because it is equal to n+sod(n) for n = 1531196 and 1531205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9313 + ... + 9475.

It is an arithmetic number, because the mean of its divisors is an integer number (91512).

2^1531222 is an apocalyptic number.

1531222 is a deficient number, since it is larger than the sum of its proper divisors (1397162).

1531222 is a wasteful number, since it uses less digits than its factorization.

1531222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244.

The product of its digits is 120, while the sum is 16.

The square root of 1531222 is about 1237.4255533162. The cubic root of 1531222 is about 115.2602047545.

Adding to 1531222 its reverse (2221351), we get a palindrome (3752573).

It can be divided in two parts, 153 and 1222, that multiplied together give a triangular number (186966 = T₆₁₁).

The spelling of 1531222 in words is "one million, five hundred thirty-one thousand, two hundred twenty-two".