1030640221 has 8 divisors (see below), whose sum is σ = 1110413304. Its totient is φ = 950937600.

The previous prime is 1030640213. The next prime is 1030640239. The reversal of 1030640221 is 1220460301.

It can be written as a sum of positive squares in 4 ways, for example, as 99780121 + 930860100 = 9989^2 + 30510^2 .

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 1030640221 - 2³ = 1030640213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1030640021) 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, 15021 + ... + 47821.

It is an arithmetic number, because the mean of its divisors is an integer number (138801663).

Almost surely, 2^1030640221 is an apocalyptic number.

It is an amenable number.

1030640221 is a deficient number, since it is larger than the sum of its proper divisors (79773083).

1030640221 is a wasteful number, since it uses less digits than its factorization.

1030640221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35231.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1030640221 is about 32103.5857966053. The cubic root of 1030640221 is about 1010.1108335058.

The spelling of 1030640221 in words is "one billion, thirty million, six hundred forty thousand, two hundred twenty-one".