4251213545 has 8 divisors (see below), whose sum is σ = 5401542024. Its totient is φ = 3200913664.

The previous prime is 4251213529. The next prime is 4251213569. The reversal of 4251213545 is 5453121524.

It can be written as a sum of positive squares in 4 ways, for example, as 75986089 + 4175227456 = 8717^2 + 64616^2 .

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 4251213545 - 2⁴ = 4251213529 is a prime.

It is a Duffinian 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, 25007054 + ... + 25007223.

It is an arithmetic number, because the mean of its divisors is an integer number (675192753).

Almost surely, 2^4251213545 is an apocalyptic number.

It is an amenable number.

4251213545 is a deficient number, since it is larger than the sum of its proper divisors (1150328479).

4251213545 is a wasteful number, since it uses less digits than its factorization.

4251213545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50014299.

The product of its digits is 24000, while the sum is 32.

The square root of 4251213545 is about 65201.3308529818. The cubic root of 4251213545 is about 1619.9600590925.

The spelling of 4251213545 in words is "four billion, two hundred fifty-one million, two hundred thirteen thousand, five hundred forty-five".