2123505245 has 8 divisors (see below), whose sum is σ = 2658998016. Its totient is φ = 1624943056.

The previous prime is 2123505233. The next prime is 2123505269. The reversal of 2123505245 is 5425053212.

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 2123505245 - 2¹⁶ = 2123439709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9232517 + ... + 9232746.

It is an arithmetic number, because the mean of its divisors is an integer number (332374752).

Almost surely, 2^2123505245 is an apocalyptic number.

It is an amenable number.

2123505245 is a deficient number, since it is larger than the sum of its proper divisors (535492771).

2123505245 is a wasteful number, since it uses less digits than its factorization.

2123505245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18465291.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 2123505245 is about 46081.5065400427. The cubic root of 2123505245 is about 1285.3392786591.

Adding to 2123505245 its reverse (5425053212), we get a palindrome (7548558457).

The spelling of 2123505245 in words is "two billion, one hundred twenty-three million, five hundred five thousand, two hundred forty-five".