201312155 has 8 divisors (see below), whose sum is σ = 263535984. Its totient is φ = 146408800.

The previous prime is 201312149. The next prime is 201312187. The reversal of 201312155 is 551213102.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-201312155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1830056 + ... + 1830165.

It is an arithmetic number, because the mean of its divisors is an integer number (32941998).

Almost surely, 2^201312155 is an apocalyptic number.

201312155 is a deficient number, since it is larger than the sum of its proper divisors (62223829).

201312155 is a wasteful number, since it uses less digits than its factorization.

201312155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3660237.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 201312155 is about 14188.4514658930. The cubic root of 201312155 is about 586.0796823856.

Adding to 201312155 its reverse (551213102), we get a palindrome (752525257).

The spelling of 201312155 in words is "two hundred one million, three hundred twelve thousand, one hundred fifty-five".