221949485491 has 8 divisors (see below), whose sum is σ = 227970983504. Its totient is φ = 215929190880.

The previous prime is 221949485477. The next prime is 221949485497. The reversal of 221949485491 is 194584949122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221949485491 - 2⁷ = 221949485363 is a prime.

It is a super-2 number, since 2×221949485491² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221949485497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79456 + ... + 670978.

It is an arithmetic number, because the mean of its divisors is an integer number (28496372938).

Almost surely, 2^221949485491 is an apocalyptic number.

221949485491 is a deficient number, since it is larger than the sum of its proper divisors (6021498013).

221949485491 is a wasteful number, since it uses less digits than its factorization.

221949485491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601701.

The product of its digits is 7464960, while the sum is 58.

The spelling of 221949485491 in words is "two hundred twenty-one billion, nine hundred forty-nine million, four hundred eighty-five thousand, four hundred ninety-one".