1601474221 has 4 divisors (see below), whose sum is σ = 1656697500. Its totient is φ = 1546250944.

The previous prime is 1601474209. The next prime is 1601474249. The reversal of 1601474221 is 1224741061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 863536996 + 737937225 = 29386^2 + 27165^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601474221 - 2¹³ = 1601466029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1601474221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601474621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27611596 + ... + 27611653.

It is an arithmetic number, because the mean of its divisors is an integer number (414174375).

Almost surely, 2^1601474221 is an apocalyptic number.

It is an amenable number.

1601474221 is a deficient number, since it is larger than the sum of its proper divisors (55223279).

1601474221 is an equidigital number, since it uses as much as digits as its factorization.

1601474221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55223278.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1601474221 is about 40018.4235196740. The cubic root of 1601474221 is about 1169.9662057105.

The spelling of 1601474221 in words is "one billion, six hundred one million, four hundred seventy-four thousand, two hundred twenty-one".