201553115 has 4 divisors (see below), whose sum is σ = 241863744. Its totient is φ = 161242488.

The previous prime is 201553091. The next prime is 201553123. The reversal of 201553115 is 511355102.

It is a happy number.

201553115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201553115 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20155307 + ... + 20155316.

It is an arithmetic number, because the mean of its divisors is an integer number (60465936).

Almost surely, 2^201553115 is an apocalyptic number.

201553115 is a deficient number, since it is larger than the sum of its proper divisors (40310629).

201553115 is an equidigital number, since it uses as much as digits as its factorization.

201553115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40310628.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 201553115 is about 14196.9403393830. The cubic root of 201553115 is about 586.3134246100.

The spelling of 201553115 in words is "two hundred one million, five hundred fifty-three thousand, one hundred fifteen".