1525321223 has 2 divisors, whose sum is σ = 1525321224. Its totient is φ = 1525321222.

The previous prime is 1525321169. The next prime is 1525321283. The reversal of 1525321223 is 3221235251.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1525321223 - 2¹² = 1525317127 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1525321192 and 1525321201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1525321283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762660611 + 762660612.

It is an arithmetic number, because the mean of its divisors is an integer number (762660612).

Almost surely, 2^1525321223 is an apocalyptic number.

1525321223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525321223 is an equidigital number, since it uses as much as digits as its factorization.

1525321223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 1525321223 is about 39055.3610020443. The cubic root of 1525321223 is about 1151.1195708211.

Adding to 1525321223 its reverse (3221235251), we get a palindrome (4746556474).

The spelling of 1525321223 in words is "one billion, five hundred twenty-five million, three hundred twenty-one thousand, two hundred twenty-three".