201956 has 12 divisors (see below), whose sum is σ = 365820. Its totient is φ = 97440.

The previous prime is 201953. The next prime is 201961. The reversal of 201956 is 659102.

It can be written as a sum of positive squares in 2 ways, for example, as 33856 + 168100 = 184^2 + 410^2 .

It is not an unprimeable number, because it can be changed into a prime (201953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755 + ... + 986.

It is an arithmetic number, because the mean of its divisors is an integer number (30485).

2²⁰¹⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

201956 is a deficient number, since it is larger than the sum of its proper divisors (163864).

201956 is a wasteful number, since it uses less digits than its factorization.

201956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774 (or 1772 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 201956 is about 449.3951490615. The cubic root of 201956 is about 58.6703825700.

The spelling of 201956 in words is "two hundred one thousand, nine hundred fifty-six".