53881563 has 4 divisors (see below), whose sum is σ = 71842088. Its totient is φ = 35921040.

The previous prime is 53881559. The next prime is 53881603. The reversal of 53881563 is 36518835.

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

It is not a de Polignac number, because 53881563 - 2² = 53881559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53881363) 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, 8980258 + ... + 8980263.

It is an arithmetic number, because the mean of its divisors is an integer number (17960522).

Almost surely, 2^53881563 is an apocalyptic number.

53881563 is a deficient number, since it is larger than the sum of its proper divisors (17960525).

53881563 is a wasteful number, since it uses less digits than its factorization.

53881563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17960524.

The product of its digits is 86400, while the sum is 39.

The square root of 53881563 is about 7340.4061876711. The cubic root of 53881563 is about 377.6997770109.

The spelling of 53881563 in words is "fifty-three million, eight hundred eighty-one thousand, five hundred sixty-three".