53581487 has 4 divisors (see below), whose sum is σ = 53632680. Its totient is φ = 53530296.

The previous prime is 53581477. The next prime is 53581511. The reversal of 53581487 is 78418535.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53581487 - 2²² = 49387183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53581417) 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, 23993 + ... + 26130.

It is an arithmetic number, because the mean of its divisors is an integer number (13408170).

Almost surely, 2^53581487 is an apocalyptic number.

53581487 is a deficient number, since it is larger than the sum of its proper divisors (51193).

53581487 is a wasteful number, since it uses less digits than its factorization.

53581487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51192.

The product of its digits is 134400, while the sum is 41.

The square root of 53581487 is about 7319.9376363464. The cubic root of 53581487 is about 376.9973122816.

The spelling of 53581487 in words is "fifty-three million, five hundred eighty-one thousand, four hundred eighty-seven".