2154445333 has 4 divisors (see below), whose sum is σ = 2154602700. Its totient is φ = 2154287968.

The previous prime is 2154445331. The next prime is 2154445417. The reversal of 2154445333 is 3335444512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1879482609 + 274962724 = 43353^2 + 16582^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154445333 - 2¹ = 2154445331 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154445331) 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, 55960 + ... + 86257.

It is an arithmetic number, because the mean of its divisors is an integer number (538650675).

Almost surely, 2^2154445333 is an apocalyptic number.

It is an amenable number.

2154445333 is a deficient number, since it is larger than the sum of its proper divisors (157367).

2154445333 is a wasteful number, since it uses less digits than its factorization.

2154445333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157366.

The product of its digits is 86400, while the sum is 34.

The square root of 2154445333 is about 46416.0029838848. The cubic root of 2154445333 is about 1291.5517917753.

Adding to 2154445333 its reverse (3335444512), we get a palindrome (5489889845).

The spelling of 2154445333 in words is "two billion, one hundred fifty-four million, four hundred forty-five thousand, three hundred thirty-three".