1521636341 has 2 divisors, whose sum is σ = 1521636342. Its totient is φ = 1521636340.

The previous prime is 1521636283. The next prime is 1521636349. The reversal of 1521636341 is 1436361251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814874116 + 706762225 = 28546^2 + 26585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1521636341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1521636298 and 1521636307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1521636349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760818170 + 760818171.

It is an arithmetic number, because the mean of its divisors is an integer number (760818171).

Almost surely, 2^1521636341 is an apocalyptic number.

It is an amenable number.

1521636341 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521636341 is an equidigital number, since it uses as much as digits as its factorization.

1521636341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 1521636341 is about 39008.1573648384. The cubic root of 1521636341 is about 1150.1918623804.

Adding to 1521636341 its reverse (1436361251), we get a palindrome (2957997592).

The spelling of 1521636341 in words is "one billion, five hundred twenty-one million, six hundred thirty-six thousand, three hundred forty-one".