201051261 has 8 divisors (see below), whose sum is σ = 297853760. Its totient is φ = 134034156.

The previous prime is 201051259. The next prime is 201051269. The reversal of 201051261 is 162150102.

It is not a de Polignac number, because 201051261 - 2¹ = 201051259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201051269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3723145 + ... + 3723198.

It is an arithmetic number, because the mean of its divisors is an integer number (37231720).

Almost surely, 2^201051261 is an apocalyptic number.

It is an amenable number.

201051261 is a deficient number, since it is larger than the sum of its proper divisors (96802499).

201051261 is an equidigital number, since it uses as much as digits as its factorization.

201051261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7446352 (or 7446346 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 201051261 is about 14179.2545995902. The cubic root of 201051261 is about 585.8263928721.

The spelling of 201051261 in words is "two hundred one million, fifty-one thousand, two hundred sixty-one".