2142215528 has 8 divisors (see below), whose sum is σ = 4016654130. Its totient is φ = 1071107760.

The previous prime is 2142215503. The next prime is 2142215531. The reversal of 2142215528 is 8255122412.

It can be written as a sum of positive squares in only one way, i.e., 1171145284 + 971070244 = 34222^2 + 31162^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2142215494 and 2142215503.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133888463 + ... + 133888478.

Almost surely, 2^2142215528 is an apocalyptic number.

It is an amenable number.

2142215528 is a deficient number, since it is larger than the sum of its proper divisors (1874438602).

2142215528 is a wasteful number, since it uses less digits than its factorization.

2142215528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267776947 (or 267776943 counting only the distinct ones).

The product of its digits is 12800, while the sum is 32.

The square root of 2142215528 is about 46284.0742372579. The cubic root of 2142215528 is about 1289.1033024826.

The spelling of 2142215528 in words is "two billion, one hundred forty-two million, two hundred fifteen thousand, five hundred twenty-eight".