201001251 has 16 divisors (see below), whose sum is σ = 309564288. Its totient is φ = 114652800.

The previous prime is 201001243. The next prime is 201001277. The reversal of 201001251 is 152100102.

It is not a de Polignac number, because 201001251 - 2³ = 201001243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201001351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178585 + ... + 179706.

It is an arithmetic number, because the mean of its divisors is an integer number (19347768).

Almost surely, 2^201001251 is an apocalyptic number.

201001251 is a deficient number, since it is larger than the sum of its proper divisors (108563037).

201001251 is a wasteful number, since it uses less digits than its factorization.

201001251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358322.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 201001251 is about 14177.4909980574. The cubic root of 201001251 is about 585.7778155304. Note that the first 3 decimals are identical.

Adding to 201001251 its reverse (152100102), we get a palindrome (353101353).

The spelling of 201001251 in words is "two hundred one million, one thousand, two hundred fifty-one".