53643261 has 16 divisors (see below), whose sum is σ = 83286144. Its totient is φ = 30074304.

The previous prime is 53643253. The next prime is 53643263. The reversal of 53643261 is 16234635.

It is not a de Polignac number, because 53643261 - 2³ = 53643253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53643263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22986 + ... + 25211.

It is an arithmetic number, because the mean of its divisors is an integer number (5205384).

Almost surely, 2^53643261 is an apocalyptic number.

It is an amenable number.

53643261 is a deficient number, since it is larger than the sum of its proper divisors (29642883).

53643261 is a wasteful number, since it uses less digits than its factorization.

53643261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48260.

The product of its digits is 12960, while the sum is 30.

The square root of 53643261 is about 7324.1559923311. The cubic root of 53643261 is about 377.1421364811.

Adding to 53643261 its reverse (16234635), we get a palindrome (69877896).

The spelling of 53643261 in words is "fifty-three million, six hundred forty-three thousand, two hundred sixty-one".