1641145231 has 8 divisors (see below), whose sum is σ = 1808798544. Its totient is φ = 1476568320.

The previous prime is 1641145229. The next prime is 1641145271. The reversal of 1641145231 is 1325411461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1641145231 - 2¹ = 1641145229 is a prime.

It is a super-2 number, since 2×1641145231² = 5386715338468086722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1641145231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641145271) 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 7 ways as a sum of consecutive naturals, for example, 767980 + ... + 770113.

It is an arithmetic number, because the mean of its divisors is an integer number (226099818).

Almost surely, 2^1641145231 is an apocalyptic number.

1641145231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1641145231 is a deficient number, since it is larger than the sum of its proper divisors (167653313).

1641145231 is a wasteful number, since it uses less digits than its factorization.

1641145231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538201.

The product of its digits is 2880, while the sum is 28.

The square root of 1641145231 is about 40511.0507269313. The cubic root of 1641145231 is about 1179.5481442875.

Adding to 1641145231 its reverse (1325411461), we get a palindrome (2966556692).

The spelling of 1641145231 in words is "one billion, six hundred forty-one million, one hundred forty-five thousand, two hundred thirty-one".