1601513523 has 12 divisors (see below), whose sum is σ = 2352506520. Its totient is φ = 1049579136.

The previous prime is 1601513519. The next prime is 1601513527. The reversal of 1601513523 is 3253151061.

1601513523 is a `hidden beast` number, since 1 + 601 + 5 + 1 + 3 + 52 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1601513519) and next prime (1601513527).

It is not a de Polignac number, because 1601513523 - 2² = 1601513519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1601513527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1507486 + ... + 1508547.

It is an arithmetic number, because the mean of its divisors is an integer number (196042210).

Almost surely, 2^1601513523 is an apocalyptic number.

1601513523 is a deficient number, since it is larger than the sum of its proper divisors (750992997).

1601513523 is a wasteful number, since it uses less digits than its factorization.

1601513523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016098 (or 3016095 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1601513523 is about 40018.9145654902. The cubic root of 1601513523 is about 1169.9757763996.

Adding to 1601513523 its reverse (3253151061), we get a palindrome (4854664584).

The spelling of 1601513523 in words is "one billion, six hundred one million, five hundred thirteen thousand, five hundred twenty-three".