201961081 has 8 divisors (see below), whose sum is σ = 233192960. Its totient is φ = 171324288.

The previous prime is 201961073. The next prime is 201961087. The reversal of 201961081 is 180169102.

It is a happy number.

201961081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 201961081 - 2³ = 201961073 is a prime.

It is a super-2 number, since 2×201961081² = 81576556477377122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201961087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148041 + ... + 149398.

It is an arithmetic number, because the mean of its divisors is an integer number (29149120).

Almost surely, 2^201961081 is an apocalyptic number.

It is an amenable number.

201961081 is a deficient number, since it is larger than the sum of its proper divisors (31231879).

201961081 is an equidigital number, since it uses as much as digits as its factorization.

201961081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297543.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 201961081 is about 14211.3011719547. The cubic root of 201961081 is about 586.7087459415.

The spelling of 201961081 in words is "two hundred one million, nine hundred sixty-one thousand, eighty-one".