201861306 has 24 divisors (see below), whose sum is σ = 440709984. Its totient is φ = 66772680.

The previous prime is 201861277. The next prime is 201861313. The reversal of 201861306 is 603168102.

It is a super-3 number, since 3×201861306³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201861306.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40446 + ... + 45161.

It is an arithmetic number, because the mean of its divisors is an integer number (18362916).

Almost surely, 2^201861306 is an apocalyptic number.

201861306 is an abundant number, since it is smaller than the sum of its proper divisors (238848678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201861306 is a wasteful number, since it uses less digits than its factorization.

201861306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85746 (or 85743 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 201861306 is about 14207.7903278448. The cubic root of 201861306 is about 586.6121126240.

The spelling of 201861306 in words is "two hundred one million, eight hundred sixty-one thousand, three hundred six".