2021280154 has 12 divisors (see below), whose sum is σ = 3199894794. Its totient is φ = 957448152.

The previous prime is 2021280143. The next prime is 2021280203. The reversal of 2021280154 is 4510821202.

It can be written as a sum of positive squares in only one way, i.e., 1835694025 + 185586129 = 42845^2 + 13623^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1399057 + ... + 1400500.

Almost surely, 2^2021280154 is an apocalyptic number.

2021280154 is a deficient number, since it is larger than the sum of its proper divisors (1178614640).

2021280154 is a wasteful number, since it uses less digits than its factorization.

2021280154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799597 (or 2799578 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 2021280154 is about 44958.6493791795. The cubic root of 2021280154 is about 1264.3738466669.

The spelling of 2021280154 in words is "two billion, twenty-one million, two hundred eighty thousand, one hundred fifty-four".