53649481 has 2 divisors, whose sum is σ = 53649482. Its totient is φ = 53649480.

The previous prime is 53649451. The next prime is 53649487. The reversal of 53649481 is 18494635.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53582400 + 67081 = 7320^2 + 259^2 .

It is a cyclic number.

It is not a de Polignac number, because 53649481 - 2⁷ = 53649353 is a prime.

It is a super-2 number, since 2×53649481² = 5756533623138722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53649487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26824740 + 26824741.

It is an arithmetic number, because the mean of its divisors is an integer number (26824741).

Almost surely, 2^53649481 is an apocalyptic number.

It is an amenable number.

53649481 is a deficient number, since it is larger than the sum of its proper divisors (1).

53649481 is an equidigital number, since it uses as much as digits as its factorization.

53649481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 40.

The square root of 53649481 is about 7324.5806023280. The cubic root of 53649481 is about 377.1567126111.

The spelling of 53649481 in words is "fifty-three million, six hundred forty-nine thousand, four hundred eighty-one".