1601001031 has 4 divisors (see below), whose sum is σ = 1829715472. Its totient is φ = 1372286592.

The previous prime is 1601001013. The next prime is 1601001053. The reversal of 1601001031 is 1301001061.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1601001031 - 2⁹ = 1601000519 is a prime.

It is a super-2 number, since 2×1601001031² = 5126408602526125922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601001001) 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, 114357210 + ... + 114357223.

It is an arithmetic number, because the mean of its divisors is an integer number (457428868).

Almost surely, 2^1601001031 is an apocalyptic number.

1601001031 is a deficient number, since it is larger than the sum of its proper divisors (228714441).

1601001031 is an equidigital number, since it uses as much as digits as its factorization.

1601001031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228714440.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1601001031 is about 40012.5109309576. The cubic root of 1601001031 is about 1169.8509638006.

Adding to 1601001031 its reverse (1301001061), we get a palindrome (2902002092).

The spelling of 1601001031 in words is "one billion, six hundred one million, one thousand, thirty-one".