2145539973 has 8 divisors (see below), whose sum is σ = 2959365600. Its totient is φ = 1381037168.

The previous prime is 2145539969. The next prime is 2145539987. The reversal of 2145539973 is 3799355412.

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 2145539973 - 2² = 2145539969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145539933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12330603 + ... + 12330776.

It is an arithmetic number, because the mean of its divisors is an integer number (369920700).

Almost surely, 2^2145539973 is an apocalyptic number.

It is an amenable number.

2145539973 is a deficient number, since it is larger than the sum of its proper divisors (813825627).

2145539973 is a wasteful number, since it uses less digits than its factorization.

2145539973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24661411.

The product of its digits is 1020600, while the sum is 48.

The square root of 2145539973 is about 46319.9738018061. The cubic root of 2145539973 is about 1289.7697990769.

The spelling of 2145539973 in words is "two billion, one hundred forty-five million, five hundred thirty-nine thousand, nine hundred seventy-three".