1521151601 has 2 divisors, whose sum is σ = 1521151602. Its totient is φ = 1521151600.

The previous prime is 1521151549. The next prime is 1521151613. The reversal of 1521151601 is 1061511251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1407750400 + 113401201 = 37520^2 + 10649^2 .

It is a cyclic number.

It is not a de Polignac number, because 1521151601 - 2¹⁰ = 1521150577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1521151651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760575800 + 760575801.

It is an arithmetic number, because the mean of its divisors is an integer number (760575801).

Almost surely, 2^1521151601 is an apocalyptic number.

It is an amenable number.

1521151601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521151601 is an equidigital number, since it uses as much as digits as its factorization.

1521151601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 23.

The square root of 1521151601 is about 39001.9435541359. The cubic root of 1521151601 is about 1150.0697124721.

Adding to 1521151601 its reverse (1061511251), we get a palindrome (2582662852).

The spelling of 1521151601 in words is "one billion, five hundred twenty-one million, one hundred fifty-one thousand, six hundred one".