1523220534 has 48 divisors (see below), whose sum is σ = 3724503120. Its totient is φ = 445663680.

The previous prime is 1523220533. The next prime is 1523220541. The reversal of 1523220534 is 4350223251.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1523220498 and 1523220507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1523220533) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 126897 + ... + 138380.

It is an arithmetic number, because the mean of its divisors is an integer number (77593815).

Almost surely, 2^1523220534 is an apocalyptic number.

1523220534 is an abundant number, since it is smaller than the sum of its proper divisors (2201282586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1523220534 is a wasteful number, since it uses less digits than its factorization.

1523220534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265325 (or 265322 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 1523220534 is about 39028.4580018222. The cubic root of 1523220534 is about 1150.5908832389.

Adding to 1523220534 its reverse (4350223251), we get a palindrome (5873443785).

The spelling of 1523220534 in words is "one billion, five hundred twenty-three million, two hundred twenty thousand, five hundred thirty-four".