2191277472 has 48 divisors (see below), whose sum is σ = 5892409152. Its totient is φ = 712609280.

The previous prime is 2191277461. The next prime is 2191277489. The reversal of 2191277472 is 2747721912.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274428 + ... + 282299.

It is an arithmetic number, because the mean of its divisors is an integer number (122758524).

Almost surely, 2^2191277472 is an apocalyptic number.

It is an amenable number.

2191277472 is an abundant number, since it is smaller than the sum of its proper divisors (3701131680).

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

2191277472 is a wasteful number, since it uses less digits than its factorization.

2191277472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556781 (or 556773 counting only the distinct ones).

The product of its digits is 98784, while the sum is 42.

The square root of 2191277472 is about 46811.0827902966. The cubic root of 2191277472 is about 1298.8703148533.

The spelling of 2191277472 in words is "two billion, one hundred ninety-one million, two hundred seventy-seven thousand, four hundred seventy-two".