201631461 has 16 divisors (see below), whose sum is σ = 280824960. Its totient is φ = 128520000.

The previous prime is 201631433. The next prime is 201631487. The reversal of 201631461 is 164136102.

It is not a de Polignac number, because 201631461 - 2⁷ = 201631333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201631421) 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, 2290 + ... + 20211.

It is an arithmetic number, because the mean of its divisors is an integer number (17551560).

Almost surely, 2^201631461 is an apocalyptic number.

It is an amenable number.

201631461 is a deficient number, since it is larger than the sum of its proper divisors (79193499).

201631461 is a wasteful number, since it uses less digits than its factorization.

201631461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22636.

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

The square root of 201631461 is about 14199.6993278027. The cubic root of 201631461 is about 586.3893836791.

Adding to 201631461 its reverse (164136102), we get a palindrome (365767563).

The spelling of 201631461 in words is "two hundred one million, six hundred thirty-one thousand, four hundred sixty-one".