1601165228 has 24 divisors (see below), whose sum is σ = 3018719088. Its totient is φ = 738720576.

The previous prime is 1601165177. The next prime is 1601165261. The reversal of 1601165228 is 8225611061.

It is a junction number, because it is equal to n+sod(n) for n = 1601165194 and 1601165203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209075 + ... + 216597.

It is an arithmetic number, because the mean of its divisors is an integer number (125779962).

Almost surely, 2^1601165228 is an apocalyptic number.

It is an amenable number.

1601165228 is a deficient number, since it is larger than the sum of its proper divisors (1417553860).

1601165228 is a wasteful number, since it uses less digits than its factorization.

1601165228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11633 (or 11631 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 1601165228 is about 40014.5626990974. The cubic root of 1601165228 is about 1169.8909553327.

Adding to 1601165228 its reverse (8225611061), we get a palindrome (9826776289).

The spelling of 1601165228 in words is "one billion, six hundred one million, one hundred sixty-five thousand, two hundred twenty-eight".