53694181 has 4 divisors (see below), whose sum is σ = 53726764. Its totient is φ = 53661600.

The previous prime is 53694169. The next prime is 53694187. The reversal of 53694181 is 18149635.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15760900 + 37933281 = 3970^2 + 6159^2 .

It is a cyclic number.

It is not a de Polignac number, because 53694181 - 2²³ = 45305573 is a prime.

It is a super-2 number, since 2×53694181² = 5766130146521522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53694181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53694187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13680 + ... + 17161.

It is an arithmetic number, because the mean of its divisors is an integer number (13431691).

Almost surely, 2^53694181 is an apocalyptic number.

It is an amenable number.

53694181 is a deficient number, since it is larger than the sum of its proper divisors (32583).

53694181 is a wasteful number, since it uses less digits than its factorization.

53694181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32582.

The product of its digits is 25920, while the sum is 37.

The square root of 53694181 is about 7327.6313362505. The cubic root of 53694181 is about 377.2614307724.

The spelling of 53694181 in words is "fifty-three million, six hundred ninety-four thousand, one hundred eighty-one".