634056221 has 4 divisors (see below), whose sum is σ = 639667452. Its totient is φ = 628444992.

The previous prime is 634056217. The next prime is 634056233. The reversal of 634056221 is 122650436.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33120025 + 600936196 = 5755^2 + 24514^2 .

It is a cyclic number.

It is not a de Polignac number, because 634056221 - 2² = 634056217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634056251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2805446 + ... + 2805671.

It is an arithmetic number, because the mean of its divisors is an integer number (159916863).

Almost surely, 2^634056221 is an apocalyptic number.

It is an amenable number.

634056221 is a deficient number, since it is larger than the sum of its proper divisors (5611231).

634056221 is a wasteful number, since it uses less digits than its factorization.

634056221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5611230.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 634056221 is about 25180.4730098543. The cubic root of 634056221 is about 859.0977652530.

The spelling of 634056221 in words is "six hundred thirty-four million, fifty-six thousand, two hundred twenty-one".