1600221451 has 2 divisors, whose sum is σ = 1600221452. Its totient is φ = 1600221450.

The previous prime is 1600221449. The next prime is 1600221503. The reversal of 1600221451 is 1541220061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1600221451 - 2¹ = 1600221449 is a prime.

Together with 1600221449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1600221151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800110725 + 800110726.

It is an arithmetic number, because the mean of its divisors is an integer number (800110726).

Almost surely, 2^1600221451 is an apocalyptic number.

1600221451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600221451 is an equidigital number, since it uses as much as digits as its factorization.

1600221451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1600221451 is about 40002.7680417243. The cubic root of 1600221451 is about 1169.6610533502.

The spelling of 1600221451 in words is "one billion, six hundred million, two hundred twenty-one thousand, four hundred fifty-one".