201117054 has 16 divisors (see below), whose sum is σ = 412045200. Its totient is φ = 65403840.

The previous prime is 201117053. The next prime is 201117143. The reversal of 201117054 is 450711102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 201117054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201117053) 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, 408529 + ... + 409020.

It is an arithmetic number, because the mean of its divisors is an integer number (25752825).

Almost surely, 2^201117054 is an apocalyptic number.

201117054 is an abundant number, since it is smaller than the sum of its proper divisors (210928146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201117054 is a wasteful number, since it uses less digits than its factorization.

201117054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817595.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 201117054 is about 14181.5744541994. The cubic root of 201117054 is about 585.8902888027.

Adding to 201117054 its reverse (450711102), we get a palindrome (651828156).

The spelling of 201117054 in words is "two hundred one million, one hundred seventeen thousand, fifty-four".