201131505 has 80 divisors (see below), whose sum is σ = 386394624. Its totient is φ = 99740160.

The previous prime is 201131479. The next prime is 201131507. The reversal of 201131505 is 505131102.

It is not a de Polignac number, because 201131505 - 2¹³ = 201123313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201131507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 901824 + ... + 902046.

Almost surely, 2^201131505 is an apocalyptic number.

It is an amenable number.

201131505 is a deficient number, since it is larger than the sum of its proper divisors (185263119).

201131505 is a wasteful number, since it uses less digits than its factorization.

201131505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 201131505 is about 14182.0839441882. The cubic root of 201131505 is about 585.9043212573.

Adding to 201131505 its reverse (505131102), we get a palindrome (706262607).

The spelling of 201131505 in words is "two hundred one million, one hundred thirty-one thousand, five hundred five".