2158278433 has 4 divisors (see below), whose sum is σ = 2159459008. Its totient is φ = 2157097860.

The previous prime is 2158278431. The next prime is 2158278491. The reversal of 2158278433 is 3348728512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2158278433 - 2¹ = 2158278431 is a prime.

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 2158278433.

It is not an unprimeable number, because it can be changed into a prime (2158278431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587541 + ... + 591202.

It is an arithmetic number, because the mean of its divisors is an integer number (539864752).

Almost surely, 2^2158278433 is an apocalyptic number.

It is an amenable number.

2158278433 is a deficient number, since it is larger than the sum of its proper divisors (1180575).

2158278433 is a wasteful number, since it uses less digits than its factorization.

2158278433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180574.

The product of its digits is 322560, while the sum is 43.

The square root of 2158278433 is about 46457.2753505842. The cubic root of 2158278433 is about 1292.3172964739.

The spelling of 2158278433 in words is "two billion, one hundred fifty-eight million, two hundred seventy-eight thousand, four hundred thirty-three".