1601103523 has 4 divisors (see below), whose sum is σ = 1610926408. Its totient is φ = 1591280640.

The previous prime is 1601103521. The next prime is 1601103557. The reversal of 1601103523 is 3253011061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3253011061 = 149 ⋅21832289.

It is a cyclic number.

It is not a de Polignac number, because 1601103523 - 2¹ = 1601103521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1601103494 and 1601103503.

It is not an unprimeable number, because it can be changed into a prime (1601103521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4911198 + ... + 4911523.

It is an arithmetic number, because the mean of its divisors is an integer number (402731602).

Almost surely, 2^1601103523 is an apocalyptic number.

1601103523 is a deficient number, since it is larger than the sum of its proper divisors (9822885).

1601103523 is an equidigital number, since it uses as much as digits as its factorization.

1601103523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9822884.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1601103523 is about 40013.7916598765. The cubic root of 1601103523 is about 1169.8759268923.

Adding to 1601103523 its reverse (3253011061), we get a palindrome (4854114584).

The spelling of 1601103523 in words is "one billion, six hundred one million, one hundred three thousand, five hundred twenty-three".