2145556433 has 8 divisors (see below), whose sum is σ = 2181164736. Its totient is φ = 2110230000.

The previous prime is 2145556429. The next prime is 2145556447. The reversal of 2145556433 is 3346555412.

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 2145556433 - 2² = 2145556429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2145556453) 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, 55091 + ... + 85592.

It is an arithmetic number, because the mean of its divisors is an integer number (272645592).

Almost surely, 2^2145556433 is an apocalyptic number.

It is an amenable number.

2145556433 is a deficient number, since it is larger than the sum of its proper divisors (35608303).

2145556433 is a wasteful number, since it uses less digits than its factorization.

2145556433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140935.

The product of its digits is 216000, while the sum is 38.

The square root of 2145556433 is about 46320.1514785951. The cubic root of 2145556433 is about 1289.7730973230.

The spelling of 2145556433 in words is "two billion, one hundred forty-five million, five hundred fifty-six thousand, four hundred thirty-three".