1522157223 has 4 divisors (see below), whose sum is σ = 2029542968. Its totient is φ = 1014771480.

The previous prime is 1522157209. The next prime is 1522157239. The reversal of 1522157223 is 3227512251.

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

It is not a de Polignac number, because 1522157223 - 2⁶ = 1522157159 is a prime.

It is a super-2 number, since 2×1522157223² = 4633925223062143458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1522157323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253692868 + ... + 253692873.

It is an arithmetic number, because the mean of its divisors is an integer number (507385742).

Almost surely, 2^1522157223 is an apocalyptic number.

1522157223 is a deficient number, since it is larger than the sum of its proper divisors (507385745).

1522157223 is an equidigital number, since it uses as much as digits as its factorization.

1522157223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507385744.

The product of its digits is 8400, while the sum is 30.

The square root of 1522157223 is about 39014.8333714243. The cubic root of 1522157223 is about 1150.3230908201.

Adding to 1522157223 its reverse (3227512251), we get a palindrome (4749669474).

The spelling of 1522157223 in words is "one billion, five hundred twenty-two million, one hundred fifty-seven thousand, two hundred twenty-three".