1601023513 has 4 divisors (see below), whose sum is σ = 1601147520. Its totient is φ = 1600899508.

The previous prime is 1601023453. The next prime is 1601023519. The reversal of 1601023513 is 3153201061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3153201061 = 2393 ⋅1317677.

It is a cyclic number.

It is not a de Polignac number, because 1601023513 - 2¹⁷ = 1600892441 is a prime.

It is a super-2 number, since 2×1601023513² = 5126552578357722338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601023519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40045 + ... + 69322.

It is an arithmetic number, because the mean of its divisors is an integer number (400286880).

Almost surely, 2^1601023513 is an apocalyptic number.

It is an amenable number.

1601023513 is a deficient number, since it is larger than the sum of its proper divisors (124007).

1601023513 is a wasteful number, since it uses less digits than its factorization.

1601023513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124006.

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

The square root of 1601023513 is about 40012.7918671017. The cubic root of 1601023513 is about 1169.8564396385.

Adding to 1601023513 its reverse (3153201061), we get a palindrome (4754224574).

The spelling of 1601023513 in words is "one billion, six hundred one million, twenty-three thousand, five hundred thirteen".