801822621 has 4 divisors (see below), whose sum is σ = 1069096832. Its totient is φ = 534548412.

The previous prime is 801822589. The next prime is 801822631. The reversal of 801822621 is 126228108.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 801822621 - 2⁵ = 801822589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801822631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133637101 + ... + 133637106.

It is an arithmetic number, because the mean of its divisors is an integer number (267274208).

Almost surely, 2^801822621 is an apocalyptic number.

It is an amenable number.

801822621 is a deficient number, since it is larger than the sum of its proper divisors (267274211).

801822621 is a wasteful number, since it uses less digits than its factorization.

801822621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267274210.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 801822621 is about 28316.4726087131. The cubic root of 801822621 is about 929.0222201201.

The spelling of 801822621 in words is "eight hundred one million, eight hundred twenty-two thousand, six hundred twenty-one".