2221761001 has 4 divisors (see below), whose sum is σ = 2226822400. Its totient is φ = 2216699604.

The previous prime is 2221760993. The next prime is 2221761037. The reversal of 2221761001 is 1001671222.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 2221761001 - 2³ = 2221760993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221761901) 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, 2530041 + ... + 2530918.

It is an arithmetic number, because the mean of its divisors is an integer number (556705600).

Almost surely, 2^2221761001 is an apocalyptic number.

It is an amenable number.

2221761001 is a deficient number, since it is larger than the sum of its proper divisors (5061399).

2221761001 is an equidigital number, since it uses as much as digits as its factorization.

2221761001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5061398.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 2221761001 is about 47135.5598354363. The cubic root of 2221761001 is about 1304.8655931411.

The spelling of 2221761001 in words is "two billion, two hundred twenty-one million, seven hundred sixty-one thousand, one".