53161661 has 8 divisors (see below), whose sum is σ = 61045824. Its totient is φ = 45349920.

The previous prime is 53161651. The next prime is 53161673. The reversal of 53161661 is 16616135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53161661 - 2¹⁴ = 53145277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53161651) 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, 16520 + ... + 19473.

It is an arithmetic number, because the mean of its divisors is an integer number (7630728).

Almost surely, 2^53161661 is an apocalyptic number.

It is an amenable number.

53161661 is a deficient number, since it is larger than the sum of its proper divisors (7884163).

53161661 is a wasteful number, since it uses less digits than its factorization.

53161661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36211.

The product of its digits is 3240, while the sum is 29.

The square root of 53161661 is about 7291.2043586777. The cubic root of 53161661 is about 376.0101028106.

Adding to 53161661 its reverse (16616135), we get a palindrome (69777796).

The spelling of 53161661 in words is "fifty-three million, one hundred sixty-one thousand, six hundred sixty-one".