2124155545 has 8 divisors (see below), whose sum is σ = 2567593224. Its totient is φ = 1686920064.

The previous prime is 2124155513. The next prime is 2124155549. The reversal of 2124155545 is 5455514212.

It can be written as a sum of positive squares in 4 ways, for example, as 733163929 + 1390991616 = 27077^2 + 37296^2 .

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 2124155545 - 2⁵ = 2124155513 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 2124155545.

It is not an unprimeable number, because it can be changed into a prime (2124155549) 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, 1549794 + ... + 1551163.

It is an arithmetic number, because the mean of its divisors is an integer number (320949153).

Almost surely, 2^2124155545 is an apocalyptic number.

It is an amenable number.

2124155545 is a deficient number, since it is larger than the sum of its proper divisors (443437679).

2124155545 is a wasteful number, since it uses less digits than its factorization.

2124155545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3101099.

The product of its digits is 40000, while the sum is 34.

The square root of 2124155545 is about 46088.5619758308. The cubic root of 2124155545 is about 1285.4704722482.

Adding to 2124155545 its reverse (5455514212), we get a palindrome (7579669757).

The spelling of 2124155545 in words is "two billion, one hundred twenty-four million, one hundred fifty-five thousand, five hundred forty-five".