201624541 has 2 divisors, whose sum is σ = 201624542. Its totient is φ = 201624540.

The previous prime is 201624517. The next prime is 201624547. The reversal of 201624541 is 145426102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188512900 + 13111641 = 13730^2 + 3621^2 .

It is a cyclic number.

It is not a de Polignac number, because 201624541 - 2⁷ = 201624413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201624547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100812270 + 100812271.

It is an arithmetic number, because the mean of its divisors is an integer number (100812271).

Almost surely, 2^201624541 is an apocalyptic number.

It is an amenable number.

201624541 is a deficient number, since it is larger than the sum of its proper divisors (1).

201624541 is an equidigital number, since it uses as much as digits as its factorization.

201624541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 201624541 is about 14199.4556585807. The cubic root of 201624541 is about 586.3826752998.

The spelling of 201624541 in words is "two hundred one million, six hundred twenty-four thousand, five hundred forty-one".