201502401521 has 2 divisors, whose sum is σ = 201502401522. Its totient is φ = 201502401520.

The previous prime is 201502401493. The next prime is 201502401553. The reversal of 201502401521 is 125104205102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145264650496 + 56237751025 = 381136^2 + 237145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201502401521 is a prime.

It is a super-2 number, since 2×201502401521² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201502400521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100751200760 + 100751200761.

It is an arithmetic number, because the mean of its divisors is an integer number (100751200761).

Almost surely, 2^201502401521 is an apocalyptic number.

It is an amenable number.

201502401521 is a deficient number, since it is larger than the sum of its proper divisors (1).

201502401521 is an equidigital number, since it uses as much as digits as its factorization.

201502401521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 201502401521 its reverse (125104205102), we get a palindrome (326606606623).

The spelling of 201502401521 in words is "two hundred one billion, five hundred two million, four hundred one thousand, five hundred twenty-one".