201551107 has 4 divisors (see below), whose sum is σ = 212159080. Its totient is φ = 190943136.

The previous prime is 201551083. The next prime is 201551111. The reversal of 201551107 is 701155102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 701155102 = 2 ⋅350577551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201551107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201551117) 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 3 ways as a sum of consecutive naturals, for example, 5303958 + ... + 5303995.

It is an arithmetic number, because the mean of its divisors is an integer number (53039770).

Almost surely, 2^201551107 is an apocalyptic number.

201551107 is a deficient number, since it is larger than the sum of its proper divisors (10607973).

201551107 is a wasteful number, since it uses less digits than its factorization.

201551107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10607972.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 201551107 is about 14196.8696197436. The cubic root of 201551107 is about 586.3114775281.

The spelling of 201551107 in words is "two hundred one million, five hundred fifty-one thousand, one hundred seven".