53691161 has 4 divisors (see below), whose sum is σ = 53707572. Its totient is φ = 53674752.

The previous prime is 53691139. The next prime is 53691191. The reversal of 53691161 is 16119635.

It is a happy number.

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 25441936 + 28249225 = 5044^2 + 5315^2 .

It is a cyclic number.

It is not a de Polignac number, because 53691161 - 2¹⁰ = 53690137 is a prime.

It is a super-3 number, since 3×53691161³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53691191) 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, 1436 + ... + 10461.

It is an arithmetic number, because the mean of its divisors is an integer number (13426893).

Almost surely, 2^53691161 is an apocalyptic number.

It is an amenable number.

53691161 is a deficient number, since it is larger than the sum of its proper divisors (16411).

53691161 is a wasteful number, since it uses less digits than its factorization.

53691161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16410.

The product of its digits is 4860, while the sum is 32.

The square root of 53691161 is about 7327.4252640337. The cubic root of 53691161 is about 377.2543576851.

The spelling of 53691161 in words is "fifty-three million, six hundred ninety-one thousand, one hundred sixty-one".