1973216541 has 8 divisors (see below), whose sum is σ = 2638538784. Its totient is φ = 1311686000.

The previous prime is 1973216513. The next prime is 1973216543. The reversal of 1973216541 is 1456123791.

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 1973216541 - 2⁶ = 1973216477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1973216541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973216543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946710 + ... + 948791.

It is an arithmetic number, because the mean of its divisors is an integer number (329817348).

Almost surely, 2^1973216541 is an apocalyptic number.

It is an amenable number.

1973216541 is a deficient number, since it is larger than the sum of its proper divisors (665322243).

1973216541 is a wasteful number, since it uses less digits than its factorization.

1973216541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895851.

The product of its digits is 45360, while the sum is 39.

The square root of 1973216541 is about 44420.9020732357. The cubic root of 1973216541 is about 1254.2715816580.

The spelling of 1973216541 in words is "one billion, nine hundred seventy-three million, two hundred sixteen thousand, five hundred forty-one".