227720901 has 4 divisors (see below), whose sum is σ = 303627872. Its totient is φ = 151813932.

The previous prime is 227720891. The next prime is 227720921. The reversal of 227720901 is 109027722.

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 not a de Polignac number, because 227720901 - 2¹¹ = 227718853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (227720921) 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, 37953481 + ... + 37953486.

It is an arithmetic number, because the mean of its divisors is an integer number (75906968).

Almost surely, 2^227720901 is an apocalyptic number.

It is an amenable number.

227720901 is a deficient number, since it is larger than the sum of its proper divisors (75906971).

227720901 is an equidigital number, since it uses as much as digits as its factorization.

227720901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75906970.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 227720901 is about 15090.4241491086. The cubic root of 227720901 is about 610.6620966488.

The spelling of 227720901 in words is "two hundred twenty-seven million, seven hundred twenty thousand, nine hundred one".