801221616 has 60 divisors (see below), whose sum is σ = 2414798568. Its totient is φ = 246529152.

The previous prime is 801221609. The next prime is 801221633. The reversal of 801221616 is 616122108.

It is a self number, because there is not a number n which added to its sum of digits gives 801221616.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 212130 + ... + 215873.

Almost surely, 2^801221616 is an apocalyptic number.

It is an amenable number.

801221616 is an abundant number, since it is smaller than the sum of its proper divisors (1613576952).

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

801221616 is a wasteful number, since it uses less digits than its factorization.

801221616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428030 (or 428021 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 801221616 is about 28305.8583335676. The cubic root of 801221616 is about 928.7900463426.

The spelling of 801221616 in words is "eight hundred one million, two hundred twenty-one thousand, six hundred sixteen".