775221473 has 8 divisors (see below), whose sum is σ = 849004800. Its totient is φ = 703459728.

The previous prime is 775221449. The next prime is 775221493. The reversal of 775221473 is 374122577.

775221473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 775221473 - 2⁶ = 775221409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775221443) 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, 504593 + ... + 506126.

It is an arithmetic number, because the mean of its divisors is an integer number (106125600).

Almost surely, 2^775221473 is an apocalyptic number.

It is an amenable number.

775221473 is a deficient number, since it is larger than the sum of its proper divisors (73783327).

775221473 is a wasteful number, since it uses less digits than its factorization.

775221473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010791.

The product of its digits is 82320, while the sum is 38.

The square root of 775221473 is about 27842.7993025127. The cubic root of 775221473 is about 918.6327647285.

The spelling of 775221473 in words is "seven hundred seventy-five million, two hundred twenty-one thousand, four hundred seventy-three".