201870117 has 48 divisors (see below), whose sum is σ = 320040000. Its totient is φ = 125730144.

The previous prime is 201870107. The next prime is 201870139. The reversal of 201870117 is 711078102.

It is not a de Polignac number, because 201870117 - 2⁷ = 201869989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201870107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1354759 + ... + 1354907.

It is an arithmetic number, because the mean of its divisors is an integer number (6667500).

Almost surely, 2^201870117 is an apocalyptic number.

201870117 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

201870117 is a deficient number, since it is larger than the sum of its proper divisors (118169883).

201870117 is a wasteful number, since it uses less digits than its factorization.

201870117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 201870117 is about 14208.1004008277. The cubic root of 201870117 is about 586.6206474678.

The spelling of 201870117 in words is "two hundred one million, eight hundred seventy thousand, one hundred seventeen".