1601222800 has 30 divisors (see below), whose sum is σ = 3846938738. Its totient is φ = 640488960.

The previous prime is 1601222783. The next prime is 1601222801. The reversal of 1601222800 is 82221061.

It can be written as a sum of positive squares in 3 ways, for example, as 512750736 + 1088472064 = 22644^2 + 32992^2 .

It is not an unprimeable number, because it can be changed into a prime (1601222801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2001129 + ... + 2001928.

Almost surely, 2^1601222800 is an apocalyptic number.

1601222800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1601222800 is an abundant number, since it is smaller than the sum of its proper divisors (2245715938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1601222800 is a wasteful number, since it uses less digits than its factorization.

1601222800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4003075 (or 4003064 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1601222800 is about 40015.2820807251. The cubic root of 1601222800 is about 1169.9049768202.

Adding to 1601222800 its reverse (82221061), we get a palindrome (1683443861).

The spelling of 1601222800 in words is "one billion, six hundred one million, two hundred twenty-two thousand, eight hundred".