2157444122 has 4 divisors (see below), whose sum is σ = 3236166186. Its totient is φ = 1078722060.

The previous prime is 2157444119. The next prime is 2157444151. The reversal of 2157444122 is 2214447512.

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

It can be written as a sum of positive squares in only one way, i.e., 2016997921 + 140446201 = 44911^2 + 11851^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539361029 + ... + 539361032.

Almost surely, 2^2157444122 is an apocalyptic number.

2157444122 is a deficient number, since it is larger than the sum of its proper divisors (1078722064).

2157444122 is a wasteful number, since it uses less digits than its factorization.

2157444122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078722063.

The product of its digits is 17920, while the sum is 32.

The square root of 2157444122 is about 46448.2951463237. The cubic root of 2157444122 is about 1292.1507542460.

The spelling of 2157444122 in words is "two billion, one hundred fifty-seven million, four hundred forty-four thousand, one hundred twenty-two".