1601251523 has 2 divisors, whose sum is σ = 1601251524. Its totient is φ = 1601251522.

The previous prime is 1601251511. The next prime is 1601251537. The reversal of 1601251523 is 3251521061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1601251523 - 2¹⁰ = 1601250499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1601251492 and 1601251501.

It is not a weakly prime, because it can be changed into another prime (1601251583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800625761 + 800625762.

It is an arithmetic number, because the mean of its divisors is an integer number (800625762).

Almost surely, 2^1601251523 is an apocalyptic number.

1601251523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601251523 is an equidigital number, since it uses as much as digits as its factorization.

1601251523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 1601251523 is about 40015.6409794970. The cubic root of 1601251523 is about 1169.9119720949.

Adding to 1601251523 its reverse (3251521061), we get a palindrome (4852772584).

The spelling of 1601251523 in words is "one billion, six hundred one million, two hundred fifty-one thousand, five hundred twenty-three".