201447631 has 16 divisors (see below), whose sum is σ = 253651968. Its totient is φ = 155412000.

The previous prime is 201447629. The next prime is 201447683. The reversal of 201447631 is 136744102.

It is a cyclic number.

It is not a de Polignac number, because 201447631 - 2¹ = 201447629 is a prime.

It is a super-2 number, since 2×201447631² = 81162296071024322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201447631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201447611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5175 + ... + 20728.

It is an arithmetic number, because the mean of its divisors is an integer number (15853248).

Almost surely, 2^201447631 is an apocalyptic number.

201447631 is a deficient number, since it is larger than the sum of its proper divisors (52204337).

201447631 is a wasteful number, since it uses less digits than its factorization.

201447631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26022.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 201447631 is about 14193.2248273604. The cubic root of 201447631 is about 586.2111232428.

The spelling of 201447631 in words is "two hundred one million, four hundred forty-seven thousand, six hundred thirty-one".