921571201 has 2 divisors, whose sum is σ = 921571202. Its totient is φ = 921571200.

The previous prime is 921571171. The next prime is 921571213. The reversal of 921571201 is 102175129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 813390400 + 108180801 = 28520^2 + 10401^2 .

It is a cyclic number.

It is not a de Polignac number, because 921571201 - 2⁵ = 921571169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 921571201.

It is not a weakly prime, because it can be changed into another prime (921551201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460785600 + 460785601.

It is an arithmetic number, because the mean of its divisors is an integer number (460785601).

Almost surely, 2^921571201 is an apocalyptic number.

It is an amenable number.

921571201 is a deficient number, since it is larger than the sum of its proper divisors (1).

921571201 is an equidigital number, since it uses as much as digits as its factorization.

921571201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 921571201 is about 30357.3912087320. The cubic root of 921571201 is about 973.1421825348.

The spelling of 921571201 in words is "nine hundred twenty-one million, five hundred seventy-one thousand, two hundred one".