201521154067 has 2 divisors, whose sum is σ = 201521154068. Its totient is φ = 201521154066.

The previous prime is 201521154041. The next prime is 201521154071. The reversal of 201521154067 is 760451125102.

201521154067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201521154067 - 2¹⁵ = 201521121299 is a prime.

It is a super-2 number, since 2×201521154067² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201521154467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100760577033 + 100760577034.

It is an arithmetic number, because the mean of its divisors is an integer number (100760577034).

Almost surely, 2^201521154067 is an apocalyptic number.

201521154067 is a deficient number, since it is larger than the sum of its proper divisors (1).

201521154067 is an equidigital number, since it uses as much as digits as its factorization.

201521154067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

Adding to 201521154067 its reverse (760451125102), we get a palindrome (961972279169).

The spelling of 201521154067 in words is "two hundred one billion, five hundred twenty-one million, one hundred fifty-four thousand, sixty-seven".