201572001 has 6 divisors (see below), whose sum is σ = 291159570. Its totient is φ = 134381328.

The previous prime is 201571991. The next prime is 201572017. The reversal of 201572001 is 100275102.

It can be written as a sum of positive squares in only one way, i.e., 148864401 + 52707600 = 12201^2 + 7260^2 .

It is not a de Polignac number, because 201572001 - 2¹⁴ = 201555617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201572071) 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 in 5 ways as a sum of consecutive naturals, for example, 11198436 + ... + 11198453.

It is an arithmetic number, because the mean of its divisors is an integer number (48526595).

Almost surely, 2^201572001 is an apocalyptic number.

It is an amenable number.

201572001 is a deficient number, since it is larger than the sum of its proper divisors (89587569).

201572001 is a wasteful number, since it uses less digits than its factorization.

201572001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22396895 (or 22396892 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 201572001 is about 14197.6054671202. The cubic root of 201572001 is about 586.3317370194.

The spelling of 201572001 in words is "two hundred one million, five hundred seventy-two thousand, one".