2211551240 has 16 divisors (see below), whose sum is σ = 4975990380. Its totient is φ = 884620480.

The previous prime is 2211551231. The next prime is 2211551261. The reversal of 2211551240 is 421551122.

It can be written as a sum of positive squares in 2 ways, for example, as 2167647364 + 43903876 = 46558^2 + 6626^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27644351 + ... + 27644430.

Almost surely, 2^2211551240 is an apocalyptic number.

2211551240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211551240 is an abundant number, since it is smaller than the sum of its proper divisors (2764439140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2211551240 is a wasteful number, since it uses less digits than its factorization.

2211551240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55288792 (or 55288788 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2211551240 is about 47027.1330191412. The cubic root of 2211551240 is about 1302.8637539008.

The spelling of 2211551240 in words is "two billion, two hundred eleven million, five hundred fifty-one thousand, two hundred forty".