201651285 has 16 divisors (see below), whose sum is σ = 351973440. Its totient is φ = 97770240.

The previous prime is 201651283. The next prime is 201651287. The reversal of 201651285 is 582156102.

It is an interprime number because it is at equal distance from previous prime (201651283) and next prime (201651287).

It is not a de Polignac number, because 201651285 - 2¹ = 201651283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201651283) 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, 610900 + ... + 611229.

It is an arithmetic number, because the mean of its divisors is an integer number (21998340).

Almost surely, 2^201651285 is an apocalyptic number.

It is an amenable number.

201651285 is a deficient number, since it is larger than the sum of its proper divisors (150322155).

201651285 is a wasteful number, since it uses less digits than its factorization.

201651285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222148.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 201651285 is about 14200.3973535954. The cubic root of 201651285 is about 586.4086005912.

It can be divided in two parts, 2016 and 51285, that added together give a triangular number (53301 = T₃₂₆).

The spelling of 201651285 in words is "two hundred one million, six hundred fifty-one thousand, two hundred eighty-five".