227721901 has 4 divisors (see below), whose sum is σ = 248423904. Its totient is φ = 207019900.

The previous prime is 227721889. The next prime is 227721911. The reversal of 227721901 is 109127722.

It is a happy number.

227721901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 227721901 - 2¹⁷ = 227590829 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (227721911) 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, 10350985 + ... + 10351006.

It is an arithmetic number, because the mean of its divisors is an integer number (62105976).

Almost surely, 2^227721901 is an apocalyptic number.

It is an amenable number.

227721901 is a deficient number, since it is larger than the sum of its proper divisors (20702003).

227721901 is a wasteful number, since it uses less digits than its factorization.

227721901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20702002.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 227721901 is about 15090.4572826671. The cubic root of 227721901 is about 610.6629905225.

The spelling of 227721901 in words is "two hundred twenty-seven million, seven hundred twenty-one thousand, nine hundred one".