1601330431 has 4 divisors (see below), whose sum is σ = 1685611000. Its totient is φ = 1517049864.

The previous prime is 1601330407. The next prime is 1601330443. The reversal of 1601330431 is 1340331061.

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: 1340331061 = 83 ⋅16148567.

It is a cyclic number.

It is not a de Polignac number, because 1601330431 - 2⁷ = 1601330303 is a prime.

It is a super-2 number, since 2×1601330431² = 5128518298493291522, 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 (1601330461) 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, 42140256 + ... + 42140293.

It is an arithmetic number, because the mean of its divisors is an integer number (421402750).

Almost surely, 2^1601330431 is an apocalyptic number.

1601330431 is a deficient number, since it is larger than the sum of its proper divisors (84280569).

1601330431 is an equidigital number, since it uses as much as digits as its factorization.

1601330431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84280568.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1601330431 is about 40016.6269318142. The cubic root of 1601330431 is about 1169.9311891253.

Adding to 1601330431 its reverse (1340331061), we get a palindrome (2941661492).

The spelling of 1601330431 in words is "one billion, six hundred one million, three hundred thirty thousand, four hundred thirty-one".