1650220401 has 8 divisors (see below), whose sum is σ = 2202046560. Its totient is φ = 1099270592.

The previous prime is 1650220381. The next prime is 1650220457. The reversal of 1650220401 is 1040220561.

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 1650220401 - 2¹⁸ = 1649958257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1650220301) 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, 214680 + ... + 222233.

It is an arithmetic number, because the mean of its divisors is an integer number (275255820).

Almost surely, 2^1650220401 is an apocalyptic number.

It is an amenable number.

1650220401 is a deficient number, since it is larger than the sum of its proper divisors (551826159).

1650220401 is a wasteful number, since it uses less digits than its factorization.

1650220401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438175.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1650220401 is about 40622.9048813597. The cubic root of 1650220401 is about 1181.7183623297.

Adding to 1650220401 its reverse (1040220561), we get a palindrome (2690440962).

The spelling of 1650220401 in words is "one billion, six hundred fifty million, two hundred twenty thousand, four hundred one".