2145226857 has 8 divisors (see below), whose sum is σ = 2861838720. Its totient is φ = 1429383120.

The previous prime is 2145226847. The next prime is 2145226879. The reversal of 2145226857 is 7586225412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2145226857 - 2¹⁰ = 2145225833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2145226847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185482 + ... + 196707.

It is an arithmetic number, because the mean of its divisors is an integer number (357729840).

Almost surely, 2^2145226857 is an apocalyptic number.

It is an amenable number.

2145226857 is a deficient number, since it is larger than the sum of its proper divisors (716611863).

2145226857 is a wasteful number, since it uses less digits than its factorization.

2145226857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384063.

The product of its digits is 268800, while the sum is 42.

The square root of 2145226857 is about 46316.5937542907. The cubic root of 2145226857 is about 1289.7070538452.

The spelling of 2145226857 in words is "two billion, one hundred forty-five million, two hundred twenty-six thousand, eight hundred fifty-seven".