201381630 has 16 divisors (see below), whose sum is σ = 483315984. Its totient is φ = 53701760.

The previous prime is 201381617. The next prime is 201381637. The reversal of 201381630 is 36183102.

201381630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 201381630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201381637) 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, 3356331 + ... + 3356390.

It is an arithmetic number, because the mean of its divisors is an integer number (30207249).

Almost surely, 2^201381630 is an apocalyptic number.

201381630 is an abundant number, since it is smaller than the sum of its proper divisors (281934354).

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

201381630 is a wasteful number, since it uses less digits than its factorization.

201381630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6712731.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 201381630 is about 14190.8995486544. The cubic root of 201381630 is about 586.1470954417.

The spelling of 201381630 in words is "two hundred one million, three hundred eighty-one thousand, six hundred thirty".