1630221545 has 12 divisors (see below), whose sum is σ = 2078111244. Its totient is φ = 1227459840.

The previous prime is 1630221503. The next prime is 1630221581. The reversal of 1630221545 is 5451220361.

It can be written as a sum of positive squares in 6 ways, for example, as 169 + 1630221376 = 13^2 + 40376^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1630221545 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 562646 + ... + 565535.

It is an arithmetic number, because the mean of its divisors is an integer number (173175937).

Almost surely, 2^1630221545 is an apocalyptic number.

It is an amenable number.

1630221545 is a deficient number, since it is larger than the sum of its proper divisors (447889699).

1630221545 is a wasteful number, since it uses less digits than its factorization.

1630221545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128220 (or 1128203 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1630221545 is about 40376.0020928274. The cubic root of 1630221545 is about 1176.9252385209.

The spelling of 1630221545 in words is "one billion, six hundred thirty million, two hundred twenty-one thousand, five hundred forty-five".