53649261 has 12 divisors (see below), whose sum is σ = 77575680. Its totient is φ = 35728200.

The previous prime is 53649247. The next prime is 53649269. The reversal of 53649261 is 16294635.

It is a happy number.

53649261 is a `hidden beast` number, since 5 + 3 + 649 + 2 + 6 + 1 = 666.

53649261 is a nontrivial binomial coefficient, being equal to C(10359, 2).

It is a de Polignac number, because none of the positive numbers 2^k-53649261 is a prime.

It is a super-2 number, since 2×53649261² = 5756486411692242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53649269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7770 + ... + 12948.

It is an arithmetic number, because the mean of its divisors is an integer number (6464640).

Almost surely, 2^53649261 is an apocalyptic number.

53649261 is the 10358-th triangular number.

It is an amenable number.

53649261 is a deficient number, since it is larger than the sum of its proper divisors (23926419).

53649261 is a wasteful number, since it uses less digits than its factorization.

53649261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6336 (or 6333 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 53649261 is about 7324.5655843879. The cubic root of 53649261 is about 377.1561970759.

The spelling of 53649261 in words is "fifty-three million, six hundred forty-nine thousand, two hundred sixty-one".