1525620223 has 4 divisors (see below), whose sum is σ = 1566853240. Its totient is φ = 1484387208.

The previous prime is 1525620203. The next prime is 1525620227. The reversal of 1525620223 is 3220265251.

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

It is a cyclic number.

It is not a de Polignac number, because 1525620223 - 2⁵ = 1525620191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1525620191 and 1525620200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525620227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20616453 + ... + 20616526.

It is an arithmetic number, because the mean of its divisors is an integer number (391713310).

Almost surely, 2^1525620223 is an apocalyptic number.

1525620223 is a deficient number, since it is larger than the sum of its proper divisors (41233017).

1525620223 is an equidigital number, since it uses as much as digits as its factorization.

1525620223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41233016.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1525620223 is about 39059.1887140529. The cubic root of 1525620223 is about 1151.1947817033.

Adding to 1525620223 its reverse (3220265251), we get a palindrome (4745885474).

The spelling of 1525620223 in words is "one billion, five hundred twenty-five million, six hundred twenty thousand, two hundred twenty-three".