1522281601 has 4 divisors (see below), whose sum is σ = 1574774100. Its totient is φ = 1469789104.

The previous prime is 1522281589. The next prime is 1522281623. The reversal of 1522281601 is 1061822251.

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 1198821376 + 323460225 = 34624^2 + 17985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1522281601 - 2⁵ = 1522281569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1522281601.

It is not an unprimeable number, because it can be changed into a prime (1522281641) 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, 26246206 + ... + 26246263.

It is an arithmetic number, because the mean of its divisors is an integer number (393693525).

Almost surely, 2^1522281601 is an apocalyptic number.

It is an amenable number.

1522281601 is a deficient number, since it is larger than the sum of its proper divisors (52492499).

1522281601 is an equidigital number, since it uses as much as digits as its factorization.

1522281601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52492498.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1522281601 is about 39016.4273223472. The cubic root of 1522281601 is about 1150.3544215715.

The spelling of 1522281601 in words is "one billion, five hundred twenty-two million, two hundred eighty-one thousand, six hundred one".