1520665222 has 4 divisors (see below), whose sum is σ = 2280997836. Its totient is φ = 760332610.

The previous prime is 1520665193. The next prime is 1520665259. The reversal of 1520665222 is 2225660251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 as a sum of consecutive naturals, namely, 380166304 + ... + 380166307.

It is an arithmetic number, because the mean of its divisors is an integer number (570249459).

Almost surely, 2^1520665222 is an apocalyptic number.

1520665222 is a deficient number, since it is larger than the sum of its proper divisors (760332614).

1520665222 is an equidigital number, since it uses as much as digits as its factorization.

1520665222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760332613.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1520665222 is about 38995.7077381601. The cubic root of 1520665222 is about 1149.9471234667.

The spelling of 1520665222 in words is "one billion, five hundred twenty million, six hundred sixty-five thousand, two hundred twenty-two".