1641023331 has 24 divisors (see below), whose sum is σ = 2313340560. Its totient is φ = 1034601984.

The previous prime is 1641023323. The next prime is 1641023333. The reversal of 1641023331 is 1333201461.

It is a happy number.

It is not a de Polignac number, because 1641023331 - 2³ = 1641023323 is a prime.

It is a super-2 number, since 2×1641023331² = 5385915145772671122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1641023333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 875211 + ... + 877083.

It is an arithmetic number, because the mean of its divisors is an integer number (96389190).

Almost surely, 2^1641023331 is an apocalyptic number.

1641023331 is a deficient number, since it is larger than the sum of its proper divisors (672317229).

1641023331 is a wasteful number, since it uses less digits than its factorization.

1641023331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723 (or 2704 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1641023331 is about 40509.5461712422. The cubic root of 1641023331 is about 1179.5189389748.

Adding to 1641023331 its reverse (1333201461), we get a palindrome (2974224792).

The spelling of 1641023331 in words is "one billion, six hundred forty-one million, twenty-three thousand, three hundred thirty-one".