201955381 has 8 divisors (see below), whose sum is σ = 211284864. Its totient is φ = 192835680.

The previous prime is 201955367. The next prime is 201955409. The reversal of 201955381 is 183559102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201955381 - 2⁷ = 201955253 is a prime.

It is a super-2 number, since 2×201955381² = 81571951829710322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201955321) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 50475 + ... + 54328.

It is an arithmetic number, because the mean of its divisors is an integer number (26410608).

Almost surely, 2^201955381 is an apocalyptic number.

It is an amenable number.

201955381 is a deficient number, since it is larger than the sum of its proper divisors (9329483).

201955381 is a wasteful number, since it uses less digits than its factorization.

201955381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104891.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 201955381 is about 14211.1006259192. The cubic root of 201955381 is about 586.7032262785.

The spelling of 201955381 in words is "two hundred one million, nine hundred fifty-five thousand, three hundred eighty-one".