201553 has 8 divisors (see below), whose sum is σ = 223776. Its totient is φ = 180000.

The previous prime is 201547. The next prime is 201557. The reversal of 201553 is 355102.

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 201553 - 2¹⁷ = 70481 is a prime.

It is a super-2 number, since 2×201553² = 81247223618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201557) 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, 678 + ... + 928.

It is an arithmetic number, because the mean of its divisors is an integer number (27972).

2²⁰¹⁵⁵³ is an apocalyptic number.

It is an amenable number.

201553 is a deficient number, since it is larger than the sum of its proper divisors (22223).

201553 is a wasteful number, since it uses less digits than its factorization.

201553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 201553 is about 448.9465447022. The cubic root of 201553 is about 58.6313313099.

Adding to 201553 its reverse (355102), we get a palindrome (556655).

The spelling of 201553 in words is "two hundred one thousand, five hundred fifty-three".