201531316 has 18 divisors (see below), whose sum is σ = 410260578. Its totient is φ = 86370480.

The previous prime is 201531301. The next prime is 201531331. The reversal of 201531316 is 613135102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (201531301) and next prime (201531331).

It can be written as a sum of positive squares in only one way, i.e., 201526416 + 4900 = 14196^2 + 70^2 .

It is a super-2 number, since 2×201531316² = 81229742657383712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 513915 + ... + 514306.

Almost surely, 2^201531316 is an apocalyptic number.

It is an amenable number.

201531316 is an abundant number, since it is smaller than the sum of its proper divisors (208729262).

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

201531316 is a wasteful number, since it uses less digits than its factorization.

201531316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028239 (or 1028230 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 201531316 is about 14196.1725827774. The cubic root of 201531316 is about 586.2922862496.

Adding to 201531316 its reverse (613135102), we get a palindrome (814666418).

The spelling of 201531316 in words is "two hundred one million, five hundred thirty-one thousand, three hundred sixteen".