1643103141 has 32 divisors (see below), whose sum is σ = 2428911360. Its totient is φ = 984259584.

The previous prime is 1643103139. The next prime is 1643103173. The reversal of 1643103141 is 1413013461.

It is not a de Polignac number, because 1643103141 - 2¹ = 1643103139 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1643103131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62941 + ... + 85133.

It is an arithmetic number, because the mean of its divisors is an integer number (75903480).

Almost surely, 2^1643103141 is an apocalyptic number.

It is an amenable number.

1643103141 is a deficient number, since it is larger than the sum of its proper divisors (785808219).

1643103141 is a wasteful number, since it uses less digits than its factorization.

1643103141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22285.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1643103141 is about 40535.2086586464. The cubic root of 1643103141 is about 1180.0170305404.

The spelling of 1643103141 in words is "one billion, six hundred forty-three million, one hundred three thousand, one hundred forty-one".