217050772 has 12 divisors (see below), whose sum is σ = 380087316. Its totient is φ = 108454400.

The previous prime is 217050751. The next prime is 217050787. The reversal of 217050772 is 277050712.

It can be written as a sum of positive squares in 2 ways, for example, as 200109316 + 16941456 = 14146^2 + 4116^2 .

It is a super-2 number, since 2×217050772² = 94222075251591968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10543 + ... + 23350.

It is an arithmetic number, because the mean of its divisors is an integer number (31673943).

Almost surely, 2^217050772 is an apocalyptic number.

It is an amenable number.

217050772 is a deficient number, since it is larger than the sum of its proper divisors (163036544).

217050772 is a wasteful number, since it uses less digits than its factorization.

217050772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35498 (or 35496 counting only the distinct ones).

The product of its (nonzero) digits is 6860, while the sum is 31.

The square root of 217050772 is about 14732.6430758367. The cubic root of 217050772 is about 600.9713636096.

The spelling of 217050772 in words is "two hundred seventeen million, fifty thousand, seven hundred seventy-two".