201531056 has 20 divisors (see below), whose sum is σ = 413435592. Its totient is φ = 94838016.

The previous prime is 201531049. The next prime is 201531089. The reversal of 201531056 is 650135102.

It is a super-2 number, since 2×201531056² = 81229533064950272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370190 + ... + 370733.

Almost surely, 2^201531056 is an apocalyptic number.

It is an amenable number.

201531056 is an abundant number, since it is smaller than the sum of its proper divisors (211904536).

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

201531056 is a wasteful number, since it uses less digits than its factorization.

201531056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740948 (or 740942 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 201531056 is about 14196.1634253766. The cubic root of 201531056 is about 586.2920341199.

Adding to 201531056 its reverse (650135102), we get a palindrome (851666158).

The spelling of 201531056 in words is "two hundred one million, five hundred thirty-one thousand, fifty-six".